diff --git a/platform/mv3/extension/_locales/ar/messages.json b/platform/mv3/extension/_locales/ar/messages.json
index f7b0a4906..5e73020ec 100644
--- a/platform/mv3/extension/_locales/ar/messages.json
+++ b/platform/mv3/extension/_locales/ar/messages.json
@@ -19,6 +19,10 @@
     "message": "الإعدادات",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "حول البرنامج",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/az/messages.json b/platform/mv3/extension/_locales/az/messages.json
index 27f7fc1b6..7df2037d0 100644
--- a/platform/mv3/extension/_locales/az/messages.json
+++ b/platform/mv3/extension/_locales/az/messages.json
@@ -19,6 +19,10 @@
     "message": "Tənzimləmələr",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Haqqında",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/be/messages.json b/platform/mv3/extension/_locales/be/messages.json
index b35b66c65..f7fa0450c 100644
--- a/platform/mv3/extension/_locales/be/messages.json
+++ b/platform/mv3/extension/_locales/be/messages.json
@@ -19,6 +19,10 @@
     "message": "Налады",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Пра пашырэнне",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/bg/messages.json b/platform/mv3/extension/_locales/bg/messages.json
index 451ca9fd2..4617b1f35 100644
--- a/platform/mv3/extension/_locales/bg/messages.json
+++ b/platform/mv3/extension/_locales/bg/messages.json
@@ -19,6 +19,10 @@
     "message": "Настройки",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Относно",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Въведете вашите собствени правила за DNR по-долу.  <b>Не добавяйте съдържание от ненадеждни източници.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/bn/messages.json b/platform/mv3/extension/_locales/bn/messages.json
index 8e89bdde8..0d5160f51 100644
--- a/platform/mv3/extension/_locales/bn/messages.json
+++ b/platform/mv3/extension/_locales/bn/messages.json
@@ -19,6 +19,10 @@
     "message": "সেটিংস",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "সম্পর্কে",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/br_FR/messages.json b/platform/mv3/extension/_locales/br_FR/messages.json
index 3a152d7e2..3a9cb7c2a 100644
--- a/platform/mv3/extension/_locales/br_FR/messages.json
+++ b/platform/mv3/extension/_locales/br_FR/messages.json
@@ -19,6 +19,10 @@
     "message": "Arventennoù",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Diwar-benn",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Lakait ho reolennoù DNR deoc'h-c'hwi amañ-dindan. <b>Arabat ouzhpennañ danvez a zeu diouzh mammennoù douetus.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/bs/messages.json b/platform/mv3/extension/_locales/bs/messages.json
index bded4c964..f6fd54177 100644
--- a/platform/mv3/extension/_locales/bs/messages.json
+++ b/platform/mv3/extension/_locales/bs/messages.json
@@ -19,6 +19,10 @@
     "message": "Postavke",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "O aplikaciji",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ca/messages.json b/platform/mv3/extension/_locales/ca/messages.json
index 9726dcc62..0997c9c02 100644
--- a/platform/mv3/extension/_locales/ca/messages.json
+++ b/platform/mv3/extension/_locales/ca/messages.json
@@ -19,6 +19,10 @@
     "message": "Configuració",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Quant a",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Introduïu les vostres pròpies regles de DNR a continuació. <b>No afegiu contingut de fonts no fiables</b>.",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/cs/messages.json b/platform/mv3/extension/_locales/cs/messages.json
index 43324e823..47609e3b6 100644
--- a/platform/mv3/extension/_locales/cs/messages.json
+++ b/platform/mv3/extension/_locales/cs/messages.json
@@ -19,6 +19,10 @@
     "message": "Nastavení",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "O rozšíření",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/cv/messages.json b/platform/mv3/extension/_locales/cv/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/cv/messages.json
+++ b/platform/mv3/extension/_locales/cv/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/cy/messages.json b/platform/mv3/extension/_locales/cy/messages.json
index e034be897..ff4d9108c 100644
--- a/platform/mv3/extension/_locales/cy/messages.json
+++ b/platform/mv3/extension/_locales/cy/messages.json
@@ -19,6 +19,10 @@
     "message": "Gosodiadau",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Ynghylch",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/da/messages.json b/platform/mv3/extension/_locales/da/messages.json
index 556f09f23..63ab8e82e 100644
--- a/platform/mv3/extension/_locales/da/messages.json
+++ b/platform/mv3/extension/_locales/da/messages.json
@@ -19,6 +19,10 @@
     "message": "Indstillinger",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Om",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Angiv egne DNR-regler nedenfor. <b>Tilføj ikke indhold fra ikke-betroede kilder.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/de/messages.json b/platform/mv3/extension/_locales/de/messages.json
index 3c1f8aaab..c2ca03e3a 100644
--- a/platform/mv3/extension/_locales/de/messages.json
+++ b/platform/mv3/extension/_locales/de/messages.json
@@ -19,6 +19,10 @@
     "message": "Einstellungen",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Über",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Eigene DNR-Regeln können unten eingetragen werden. <b>Verwenden Sie keine Regeln aus unseriösen Quellen.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/el/messages.json b/platform/mv3/extension/_locales/el/messages.json
index b9838cd38..e23bbea81 100644
--- a/platform/mv3/extension/_locales/el/messages.json
+++ b/platform/mv3/extension/_locales/el/messages.json
@@ -19,6 +19,10 @@
     "message": "Ρυθμίσεις",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Σχετικά",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Εισάγετε παρακάτω τους δικούς σας κανόνες DNR. <b>Μην προσθέσετε περιεχόμενο από πηγές που δεν είναι αξιόπιστες.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/en_GB/messages.json b/platform/mv3/extension/_locales/en_GB/messages.json
index f61236cc6..0fb164749 100644
--- a/platform/mv3/extension/_locales/en_GB/messages.json
+++ b/platform/mv3/extension/_locales/en_GB/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/eo/messages.json b/platform/mv3/extension/_locales/eo/messages.json
index acc785f1d..56d1d3006 100644
--- a/platform/mv3/extension/_locales/eo/messages.json
+++ b/platform/mv3/extension/_locales/eo/messages.json
@@ -19,6 +19,10 @@
     "message": "Agordoj",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Pri",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/es/messages.json b/platform/mv3/extension/_locales/es/messages.json
index b990345af..cd0175a56 100644
--- a/platform/mv3/extension/_locales/es/messages.json
+++ b/platform/mv3/extension/_locales/es/messages.json
@@ -19,6 +19,10 @@
     "message": "Configuración",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Acerca de",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Ingresa tus propias reglas DNR abajo. <b>No agregues contenido desde fuentes no confiables.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/et/messages.json b/platform/mv3/extension/_locales/et/messages.json
index e0eba83e2..5e97968f7 100644
--- a/platform/mv3/extension/_locales/et/messages.json
+++ b/platform/mv3/extension/_locales/et/messages.json
@@ -19,6 +19,10 @@
     "message": "Sätted",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Teave",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enda aadressiresolverite avastamise reegli sisestamiseks klõpsake siia. <b>Ärge lisage kahtlaste allikate sisu.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/eu/messages.json b/platform/mv3/extension/_locales/eu/messages.json
index 22594ceb4..aba7d7f69 100644
--- a/platform/mv3/extension/_locales/eu/messages.json
+++ b/platform/mv3/extension/_locales/eu/messages.json
@@ -19,6 +19,10 @@
     "message": "Ezarpenak",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Honi buruz",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/fa/messages.json b/platform/mv3/extension/_locales/fa/messages.json
index 743cc736a..10f156aa0 100644
--- a/platform/mv3/extension/_locales/fa/messages.json
+++ b/platform/mv3/extension/_locales/fa/messages.json
@@ -19,6 +19,10 @@
     "message": "تنظیمات",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "درباره",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/fi/messages.json b/platform/mv3/extension/_locales/fi/messages.json
index 4e7836a40..742511be0 100644
--- a/platform/mv3/extension/_locales/fi/messages.json
+++ b/platform/mv3/extension/_locales/fi/messages.json
@@ -19,6 +19,10 @@
     "message": "Asetukset",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Tietoja",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Syötä omat DNS-sääntösi alle. <b>Älä lisää sisältöä lähteistä, joihin et luota.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/fil/messages.json b/platform/mv3/extension/_locales/fil/messages.json
index a9ed6840d..4be70d504 100644
--- a/platform/mv3/extension/_locales/fil/messages.json
+++ b/platform/mv3/extension/_locales/fil/messages.json
@@ -19,6 +19,10 @@
     "message": "Mga Setting",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Tungkol",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/fr/messages.json b/platform/mv3/extension/_locales/fr/messages.json
index fd73fe610..926f06b76 100644
--- a/platform/mv3/extension/_locales/fr/messages.json
+++ b/platform/mv3/extension/_locales/fr/messages.json
@@ -19,6 +19,10 @@
     "message": "Paramètres",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "À propos",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Entrez vos propres règles DNR (Declarative Net Request, ou requête réseau déclarative) ci-dessous. <b>N'ajoutez pas de contenu provenant de sources non-fiables.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/fy/messages.json b/platform/mv3/extension/_locales/fy/messages.json
index 5d8d96ef0..fbcee7d63 100644
--- a/platform/mv3/extension/_locales/fy/messages.json
+++ b/platform/mv3/extension/_locales/fy/messages.json
@@ -19,6 +19,10 @@
     "message": "Ynstellingen",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Oer",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Fier hjirûnder jo eigen DNR-regels yn. <b>Foegje gjin ynhâld fan net-fertroude boarnen ta.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/gl/messages.json b/platform/mv3/extension/_locales/gl/messages.json
index 3f12d28e6..d42380327 100644
--- a/platform/mv3/extension/_locales/gl/messages.json
+++ b/platform/mv3/extension/_locales/gl/messages.json
@@ -19,6 +19,10 @@
     "message": "Axustes",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Acerca de",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Escribe as regras DNR embaixo. <b>Non engadas contido desde orixes non confiables.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/gu/messages.json b/platform/mv3/extension/_locales/gu/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/gu/messages.json
+++ b/platform/mv3/extension/_locales/gu/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/he/messages.json b/platform/mv3/extension/_locales/he/messages.json
index e2a0cc55b..dfe42dcdb 100644
--- a/platform/mv3/extension/_locales/he/messages.json
+++ b/platform/mv3/extension/_locales/he/messages.json
@@ -19,6 +19,10 @@
     "message": "הגדרות",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "על אודות",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "הכניסו את חוקי ה DNR שלכם למטה.  <b>אל תכניסו תוכן ממקורות לא בטוחים.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/hi/messages.json b/platform/mv3/extension/_locales/hi/messages.json
index 42fae5800..a1664a6ae 100644
--- a/platform/mv3/extension/_locales/hi/messages.json
+++ b/platform/mv3/extension/_locales/hi/messages.json
@@ -19,6 +19,10 @@
     "message": "सेटिंग्स",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "जानकारी",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/hr/messages.json b/platform/mv3/extension/_locales/hr/messages.json
index f2cd12f97..e3d703f20 100644
--- a/platform/mv3/extension/_locales/hr/messages.json
+++ b/platform/mv3/extension/_locales/hr/messages.json
@@ -19,6 +19,10 @@
     "message": "Postavke",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "O aplikaciji",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Unesite svoja DNR pravila u nastavku. <b>Nemojte dodavati sadržaj iz nepouzdanih izvora.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/hu/messages.json b/platform/mv3/extension/_locales/hu/messages.json
index d7eee7347..82a6cc5e6 100644
--- a/platform/mv3/extension/_locales/hu/messages.json
+++ b/platform/mv3/extension/_locales/hu/messages.json
@@ -19,6 +19,10 @@
     "message": "Beállítások",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Névjegy",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/hy/messages.json b/platform/mv3/extension/_locales/hy/messages.json
index 853b02071..f9a45929f 100644
--- a/platform/mv3/extension/_locales/hy/messages.json
+++ b/platform/mv3/extension/_locales/hy/messages.json
@@ -19,6 +19,10 @@
     "message": "Կարգավորումներ",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Ընդլայնման մասին",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/id/messages.json b/platform/mv3/extension/_locales/id/messages.json
index 9760f0e83..3c5f42fe7 100644
--- a/platform/mv3/extension/_locales/id/messages.json
+++ b/platform/mv3/extension/_locales/id/messages.json
@@ -19,6 +19,10 @@
     "message": "Pengaturan",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Tentang",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/it/messages.json b/platform/mv3/extension/_locales/it/messages.json
index c30cc01a4..df2625096 100644
--- a/platform/mv3/extension/_locales/it/messages.json
+++ b/platform/mv3/extension/_locales/it/messages.json
@@ -19,6 +19,10 @@
     "message": "Impostazioni",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Informazioni",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Inserisci le tue regole DNR qui sotto. <b>Non aggiungere contenuti da fonti non attendibili.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ja/messages.json b/platform/mv3/extension/_locales/ja/messages.json
index 0e00e22a7..629b69f51 100644
--- a/platform/mv3/extension/_locales/ja/messages.json
+++ b/platform/mv3/extension/_locales/ja/messages.json
@@ -19,6 +19,10 @@
     "message": "設定",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "uBO Lite について",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ka/messages.json b/platform/mv3/extension/_locales/ka/messages.json
index 59b33f61b..eb407fb0e 100644
--- a/platform/mv3/extension/_locales/ka/messages.json
+++ b/platform/mv3/extension/_locales/ka/messages.json
@@ -19,6 +19,10 @@
     "message": "პარამეტრები",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "შესახებ",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/kk/messages.json b/platform/mv3/extension/_locales/kk/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/kk/messages.json
+++ b/platform/mv3/extension/_locales/kk/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/kn/messages.json b/platform/mv3/extension/_locales/kn/messages.json
index 357c70f7e..fe69ab48c 100644
--- a/platform/mv3/extension/_locales/kn/messages.json
+++ b/platform/mv3/extension/_locales/kn/messages.json
@@ -19,6 +19,10 @@
     "message": "ಸಂಯೋಜನೆಗಳು",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "ಬಗ್ಗೆ",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ko/messages.json b/platform/mv3/extension/_locales/ko/messages.json
index f18e86be1..3af874c10 100644
--- a/platform/mv3/extension/_locales/ko/messages.json
+++ b/platform/mv3/extension/_locales/ko/messages.json
@@ -19,6 +19,10 @@
     "message": "설정",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "정보",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/lt/messages.json b/platform/mv3/extension/_locales/lt/messages.json
index 60955d7cd..fdca5a990 100644
--- a/platform/mv3/extension/_locales/lt/messages.json
+++ b/platform/mv3/extension/_locales/lt/messages.json
@@ -19,6 +19,10 @@
     "message": "Nustatymai",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Apie",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/lv/messages.json b/platform/mv3/extension/_locales/lv/messages.json
index 2a84699f7..bf857a5b2 100644
--- a/platform/mv3/extension/_locales/lv/messages.json
+++ b/platform/mv3/extension/_locales/lv/messages.json
@@ -19,6 +19,10 @@
     "message": "Iestatījumi",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Par",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Zemāk ir ievadi savas DNR kārtulas! <b>Nepievieno saturu no neuzticamiem avotiem!</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/mk/messages.json b/platform/mv3/extension/_locales/mk/messages.json
index 431dba89a..79a1a924b 100644
--- a/platform/mv3/extension/_locales/mk/messages.json
+++ b/platform/mv3/extension/_locales/mk/messages.json
@@ -19,6 +19,10 @@
     "message": "Прилагодби",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Информации за...",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ml/messages.json b/platform/mv3/extension/_locales/ml/messages.json
index 4e6a284b4..e266c865d 100644
--- a/platform/mv3/extension/_locales/ml/messages.json
+++ b/platform/mv3/extension/_locales/ml/messages.json
@@ -19,6 +19,10 @@
     "message": "ക്രമീകരണങ്ങൾ",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "കുറിച്ച്",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/mr/messages.json b/platform/mv3/extension/_locales/mr/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/mr/messages.json
+++ b/platform/mv3/extension/_locales/mr/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ms/messages.json b/platform/mv3/extension/_locales/ms/messages.json
index a0c5b761b..48bd33ff4 100644
--- a/platform/mv3/extension/_locales/ms/messages.json
+++ b/platform/mv3/extension/_locales/ms/messages.json
@@ -19,6 +19,10 @@
     "message": "Tetapan",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Mengenai",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/nb/messages.json b/platform/mv3/extension/_locales/nb/messages.json
index 25d28af42..2100015b8 100644
--- a/platform/mv3/extension/_locales/nb/messages.json
+++ b/platform/mv3/extension/_locales/nb/messages.json
@@ -19,6 +19,10 @@
     "message": "Innstillinger",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Om",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Legg til dine egne DNR-regler under. <b>Ikke legg til innhold fra usikre kilder.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/nl/messages.json b/platform/mv3/extension/_locales/nl/messages.json
index a4bb05b72..fe07adcb2 100644
--- a/platform/mv3/extension/_locales/nl/messages.json
+++ b/platform/mv3/extension/_locales/nl/messages.json
@@ -19,6 +19,10 @@
     "message": "Instellingen",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Over",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Voer hieronder uw eigen DNR-regels in. <b>Voeg geen inhoud van niet-vertrouwde bronnen toe.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/oc/messages.json b/platform/mv3/extension/_locales/oc/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/oc/messages.json
+++ b/platform/mv3/extension/_locales/oc/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/pa/messages.json b/platform/mv3/extension/_locales/pa/messages.json
index 035a82fc7..ce043fb5c 100644
--- a/platform/mv3/extension/_locales/pa/messages.json
+++ b/platform/mv3/extension/_locales/pa/messages.json
@@ -19,6 +19,10 @@
     "message": "ਸੈਟਿੰਗਾਂ",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "ਇਸ ਬਾਰੇ",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/pl/messages.json b/platform/mv3/extension/_locales/pl/messages.json
index e39d4d650..150a1a47d 100644
--- a/platform/mv3/extension/_locales/pl/messages.json
+++ b/platform/mv3/extension/_locales/pl/messages.json
@@ -19,6 +19,10 @@
     "message": "Ustawienia",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "O rozszerzeniu",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Wprowadź poniżej własne zasady DNR. <b>Nie dodawaj treści z niezaufanych źródeł.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/pt_BR/messages.json b/platform/mv3/extension/_locales/pt_BR/messages.json
index a3b43ef3e..ea305ce19 100644
--- a/platform/mv3/extension/_locales/pt_BR/messages.json
+++ b/platform/mv3/extension/_locales/pt_BR/messages.json
@@ -19,6 +19,10 @@
     "message": "Configurações",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Sobre",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Insira suas próprias regras DNR abaixo. <b>Não adicione conteúdo de fontes não confiáveis.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/pt_PT/messages.json b/platform/mv3/extension/_locales/pt_PT/messages.json
index a3cadf195..e5006ce8a 100644
--- a/platform/mv3/extension/_locales/pt_PT/messages.json
+++ b/platform/mv3/extension/_locales/pt_PT/messages.json
@@ -19,6 +19,10 @@
     "message": "Definições",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Acerca",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ro/messages.json b/platform/mv3/extension/_locales/ro/messages.json
index ce522a2bd..4da91a9e5 100644
--- a/platform/mv3/extension/_locales/ro/messages.json
+++ b/platform/mv3/extension/_locales/ro/messages.json
@@ -19,6 +19,10 @@
     "message": "Opțiuni",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Despre",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ru/messages.json b/platform/mv3/extension/_locales/ru/messages.json
index 6cafaf01b..9a9f6a15d 100644
--- a/platform/mv3/extension/_locales/ru/messages.json
+++ b/platform/mv3/extension/_locales/ru/messages.json
@@ -19,6 +19,10 @@
     "message": "Настройки",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "О расширении",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Введите свои правила в формате DNR ниже. <b>Не добавляйте содержимое из ненадёжных источников.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/si/messages.json b/platform/mv3/extension/_locales/si/messages.json
index 5d6467aa9..30d530637 100644
--- a/platform/mv3/extension/_locales/si/messages.json
+++ b/platform/mv3/extension/_locales/si/messages.json
@@ -19,6 +19,10 @@
     "message": "සැකසුම්",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "පිළිබඳ",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/sk/messages.json b/platform/mv3/extension/_locales/sk/messages.json
index 5e8db88b0..74a3243d5 100644
--- a/platform/mv3/extension/_locales/sk/messages.json
+++ b/platform/mv3/extension/_locales/sk/messages.json
@@ -19,6 +19,10 @@
     "message": "Nastavenia",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "O doplnku",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Zadajte svoje vlastné pravidlá DNR. <b>Nepridávajte obsah z nedôveryhodných zdrojov.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/sl/messages.json b/platform/mv3/extension/_locales/sl/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/sl/messages.json
+++ b/platform/mv3/extension/_locales/sl/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/so/messages.json b/platform/mv3/extension/_locales/so/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/so/messages.json
+++ b/platform/mv3/extension/_locales/so/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/sq/messages.json b/platform/mv3/extension/_locales/sq/messages.json
index 97675a6b6..3a953418c 100644
--- a/platform/mv3/extension/_locales/sq/messages.json
+++ b/platform/mv3/extension/_locales/sq/messages.json
@@ -19,6 +19,10 @@
     "message": "Parametrat",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Info",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/sr/messages.json b/platform/mv3/extension/_locales/sr/messages.json
index 2ba999653..7d60f2fae 100644
--- a/platform/mv3/extension/_locales/sr/messages.json
+++ b/platform/mv3/extension/_locales/sr/messages.json
@@ -19,6 +19,10 @@
     "message": "Подешавања",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "О апликацији",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/sv/messages.json b/platform/mv3/extension/_locales/sv/messages.json
index e8df0696c..5eee1f559 100644
--- a/platform/mv3/extension/_locales/sv/messages.json
+++ b/platform/mv3/extension/_locales/sv/messages.json
@@ -19,6 +19,10 @@
     "message": "Inställningar",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Om",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Ange dina egna DNR-regler nedan. <b>Lägg inte till innehåll från opålitliga källor.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/sw/messages.json b/platform/mv3/extension/_locales/sw/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/sw/messages.json
+++ b/platform/mv3/extension/_locales/sw/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ta/messages.json b/platform/mv3/extension/_locales/ta/messages.json
index 136a025b9..484529aa5 100644
--- a/platform/mv3/extension/_locales/ta/messages.json
+++ b/platform/mv3/extension/_locales/ta/messages.json
@@ -19,6 +19,10 @@
     "message": "Settings",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "About",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/te/messages.json b/platform/mv3/extension/_locales/te/messages.json
index e96f32008..003dd51ae 100644
--- a/platform/mv3/extension/_locales/te/messages.json
+++ b/platform/mv3/extension/_locales/te/messages.json
@@ -19,6 +19,10 @@
     "message": "ఐచ్చికాలు",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "మా గురించి",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/th/messages.json b/platform/mv3/extension/_locales/th/messages.json
index 2d498371d..9d9a317f3 100644
--- a/platform/mv3/extension/_locales/th/messages.json
+++ b/platform/mv3/extension/_locales/th/messages.json
@@ -19,6 +19,10 @@
     "message": "การตั้งค่า",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "เกี่ยวกับเรา",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/tr/messages.json b/platform/mv3/extension/_locales/tr/messages.json
index 4f0cc0cbc..8b3ef0095 100644
--- a/platform/mv3/extension/_locales/tr/messages.json
+++ b/platform/mv3/extension/_locales/tr/messages.json
@@ -19,6 +19,10 @@
     "message": "Ayarlar",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Hakkında",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Aşağıya kendi DNR kurallarınızı girin. <b>Güvenilmeyen kaynaklardan içerik eklemeyin.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/uk/messages.json b/platform/mv3/extension/_locales/uk/messages.json
index 4d733448a..0cc407c49 100644
--- a/platform/mv3/extension/_locales/uk/messages.json
+++ b/platform/mv3/extension/_locales/uk/messages.json
@@ -19,6 +19,10 @@
     "message": "Налаштування",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Про застосунок",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Введіть свої правила в форматі DNR нижче. <b>Не додавайте вміст з ненадійних джерел.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/ur/messages.json b/platform/mv3/extension/_locales/ur/messages.json
index 1a11f8f4e..7265fe9ac 100644
--- a/platform/mv3/extension/_locales/ur/messages.json
+++ b/platform/mv3/extension/_locales/ur/messages.json
@@ -19,6 +19,10 @@
     "message": "ترتیبات",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "تعارف",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/vi/messages.json b/platform/mv3/extension/_locales/vi/messages.json
index bbe6c7d4f..d1121754c 100644
--- a/platform/mv3/extension/_locales/vi/messages.json
+++ b/platform/mv3/extension/_locales/vi/messages.json
@@ -19,6 +19,10 @@
     "message": "Cài đặt",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "Giới thiệu",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/zh_CN/messages.json b/platform/mv3/extension/_locales/zh_CN/messages.json
index 69640caf4..3a4ca55db 100644
--- a/platform/mv3/extension/_locales/zh_CN/messages.json
+++ b/platform/mv3/extension/_locales/zh_CN/messages.json
@@ -19,6 +19,10 @@
     "message": "设置",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "关于",
     "description": "appears as tab name in dashboard"
@@ -240,7 +244,7 @@
     "description": "Label for a checkbox in the options page"
   },
   "developerModeLegend": {
-    "message": "Enable access to features suitable for technical users.",
+    "message": "Enables access to features suitable for technical users.",
     "description": "Short description for a checkbox in the options page"
   },
   "findListsPlaceholder": {
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "Enter your own DNR rules below. <b>Do not add content from untrusted sources.</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }
diff --git a/platform/mv3/extension/_locales/zh_TW/messages.json b/platform/mv3/extension/_locales/zh_TW/messages.json
index a37fc514a..e2cacb9d3 100644
--- a/platform/mv3/extension/_locales/zh_TW/messages.json
+++ b/platform/mv3/extension/_locales/zh_TW/messages.json
@@ -19,6 +19,10 @@
     "message": "設定",
     "description": "appears as tab name in dashboard"
   },
+  "developPageName": {
+    "message": "Develop",
+    "description": "appears as tab name in dashboard. Inspired from 'Develop' menu in Safari, see <https://developer.apple.com/documentation/safari-developer-tools/develop-menu>"
+  },
   "aboutPageName": {
     "message": "關於",
     "description": "appears as tab name in dashboard"
@@ -310,5 +314,9 @@
   "dnrRulesSummary": {
     "message": "請在下方輸入您的 DNR 規則。<b>請勿新增來自不受信任來源的內容。</b>",
     "description": "Short description of the DNR rules editor pane"
+  },
+  "dnrRulesCountInfo": {
+    "message": "Number of registered rules: {count}",
+    "description": "Short sentence to report the number of currently registered DNR rules"
   }
 }