diff --git a/platform/firefox/vapi-client.js b/platform/firefox/vapi-client.js
index 58bb110..c9caa85 100644
--- a/platform/firefox/vapi-client.js
+++ b/platform/firefox/vapi-client.js
@@ -166,12 +166,6 @@ window.addEventListener('pageshow', vAPI.messaging.toggleListener, true);
 
 /******************************************************************************/
 
-vAPI.canExecuteContentScript = function() {
-    return true;
-};
-
-/******************************************************************************/
-
 })(this);
 
 /******************************************************************************/