diff --git a/platform/mv3/extension/js/background.js b/platform/mv3/extension/js/background.js
index bf316e925..c62f1debe 100644
--- a/platform/mv3/extension/js/background.js
+++ b/platform/mv3/extension/js/background.js
@@ -191,7 +191,7 @@ function onMessage(request, sender, callback) {
             origin: 'USER',
             target: { tabId, frameIds: [ frameId ] },
         }).catch(reason => {
-            ubolErr(reason);
+            ubolErr(`insertCSS/${reason}`);
         });
         return false;
     }
@@ -203,7 +203,7 @@ function onMessage(request, sender, callback) {
             origin: 'USER',
             target: { tabId, frameIds: [ frameId ] },
         }).catch(reason => {
-            ubolErr(reason);
+            ubolErr(`removeCSS/${reason}`);
         });
         return false;
     }
@@ -242,7 +242,7 @@ function onMessage(request, sender, callback) {
             target: { tabId, frameIds: [ frameId ] },
             injectImmediately: true,
         }).catch(reason => {
-            ubolErr(reason);
+            ubolErr(`executeScript/${reason}`);
         }).then(( ) => {
             callback();
         });
diff --git a/platform/mv3/extension/js/fetch.js b/platform/mv3/extension/js/fetch.js
index 3c44ae102..d93f7e175 100644
--- a/platform/mv3/extension/js/fetch.js
+++ b/platform/mv3/extension/js/fetch.js
@@ -27,7 +27,7 @@ function fetchJSON(path) {
     return fetch(`${path}.json`).then(response =>
         response.json()
     ).catch(reason => {
-        ubolErr(reason);
+        ubolErr(`fetchJSON/${reason}`);
     });
 }
 
diff --git a/platform/mv3/extension/js/filter-manager.js b/platform/mv3/extension/js/filter-manager.js
index 94a41b7b2..a968bc8c1 100644
--- a/platform/mv3/extension/js/filter-manager.js
+++ b/platform/mv3/extension/js/filter-manager.js
@@ -85,7 +85,7 @@ export function startCustomFilters(tabId, frameId) {
         target: { tabId, frameIds: [ frameId ] },
         injectImmediately: true,
     }).catch(reason => {
-        ubolErr(reason);
+        ubolErr(`startCustomFilters/${reason}`);
     })
 }
 
@@ -95,7 +95,7 @@ export function terminateCustomFilters(tabId, frameId) {
         target: { tabId, frameIds: [ frameId ] },
         injectImmediately: true,
     }).catch(reason => {
-        ubolErr(reason);
+        ubolErr(`terminateCustomFilters/${reason}`);
     })
 }
 
@@ -113,7 +113,7 @@ export async function injectCustomFilters(tabId, frameId, hostname) {
                 origin: 'USER',
                 target: { tabId, frameIds: [ frameId ] },
             }).catch(reason => {
-                ubolErr(reason);
+                ubolErr(`injectCustomFilters/insertCSS/${reason}`);
             })
         );
     }
@@ -125,7 +125,7 @@ export async function injectCustomFilters(tabId, frameId, hostname) {
                 target: { tabId, frameIds: [ frameId ] },
                 injectImmediately: true,
             }).catch(reason => {
-                ubolErr(reason);
+                ubolErr(`injectCustomFilters/executeScript/${reason}`);
             })
         );
     }
diff --git a/platform/mv3/extension/js/ruleset-manager.js b/platform/mv3/extension/js/ruleset-manager.js
index ee33fdfb5..b51af9c46 100644
--- a/platform/mv3/extension/js/ruleset-manager.js
+++ b/platform/mv3/extension/js/ruleset-manager.js
@@ -318,7 +318,7 @@ async function updateDynamicRules() {
             ubolLog(`Add ${addRules.length} dynamic DNR rules`);
         }
     } catch(reason) {
-        ubolErr(`updateDynamicRules() / ${reason}`);
+        ubolErr(`updateDynamicRules/${reason}`);
         response.error = `${reason}`;
     }
 
@@ -472,7 +472,7 @@ async function updateSessionRules() {
             ubolLog(`Add ${addRules.length} session DNR rules`);
         }
     } catch(reason) {
-        ubolErr(`updateSessionRules() / ${reason}`);
+        ubolErr(`updateSessionRules/${reason}`);
         response.error = `${reason}`;
     }
     return response;
@@ -667,7 +667,7 @@ async function enableRulesets(ids) {
         enableRulesetIds,
         disableRulesetIds,
     }).catch(reason => {
-        ubolErr(reason);
+        ubolErr(`updateEnabledRulesets/${reason}`);
         response.error = `${reason}`;
     });
 
@@ -684,7 +684,7 @@ async function enableRulesets(ids) {
         ubolLog(`Available static rule count: ${count}`);
         response.staticRuleCount = count;
     }).catch(reason => {
-        ubolErr(reason);
+        ubolErr(`getEnabledRulesets/${reason}`);
     });
 
     return response;
@@ -781,7 +781,7 @@ async function updateUserRules() {
         out.added = addRules.length;
         out.removed = removeRuleIds.length;
     } catch(reason) {
-        ubolErr(`updateUserRules() / ${reason}`);
+        ubolErr(`updateUserRules/${reason}`);
         out.errors.push(`${reason}`);
     } finally {
         const userRules = await getEffectiveUserRules();
diff --git a/platform/mv3/extension/js/scripting-manager.js b/platform/mv3/extension/js/scripting-manager.js
index 58d7161cd..5e31eaf1f 100644
--- a/platform/mv3/extension/js/scripting-manager.js
+++ b/platform/mv3/extension/js/scripting-manager.js
@@ -551,7 +551,7 @@ async function registerInjectables() {
             await browser.scripting.unregisterContentScripts({ ids: toRemove });
             localRemove('$scripting.unregisterContentScripts');
         } catch(reason) {
-            ubolErr(reason);
+            ubolErr(`unregisterContentScripts/${reason}`);
         }
     }
 
@@ -561,7 +561,7 @@ async function registerInjectables() {
             await browser.scripting.registerContentScripts(toAdd);
             localRemove('$scripting.registerContentScripts');
         } catch(reason) {
-            ubolErr(reason);
+            ubolErr(`registerContentScripts/${reason}`);
         }
     }