diff --git a/platform/mv3/extension/js/scripting/css-procedural.js b/platform/mv3/extension/js/scripting/css-procedural.js
index 26968b03c..3e0b2600b 100644
--- a/platform/mv3/extension/js/scripting/css-procedural.js
+++ b/platform/mv3/extension/js/scripting/css-procedural.js
@@ -60,6 +60,8 @@ self.isolatedAPI.forEachHostname(lookupAll, {
 });
 proceduralImports.length = 0;
 
+if ( selectors.length === 0 ) { return; }
+
 const exceptedSelectors = exceptions.length !== 0
     ? selectors.filter(a => exceptions.includes(JSON.stringify(a)) === false)
     : selectors;
diff --git a/platform/mv3/extension/js/scripting/css-specific.js b/platform/mv3/extension/js/scripting/css-specific.js
index 2d2c0db37..eee90a04d 100644
--- a/platform/mv3/extension/js/scripting/css-specific.js
+++ b/platform/mv3/extension/js/scripting/css-specific.js
@@ -58,6 +58,8 @@ self.isolatedAPI.forEachHostname(lookupAll, {
 
 specificImports.length = 0;
 
+if ( selectors.length === 0 ) { return; }
+
 const exceptedSelectors = exceptions.length !== 0
     ? selectors.filter(a => exceptions.includes(a) === false)
     : selectors;