diff --git a/internals/buildversion.txt b/internals/buildversion.txt
index c047c4a..7c2b018 100644
--- a/internals/buildversion.txt
+++ b/internals/buildversion.txt
@@ -1 +1 @@
-518
\ No newline at end of file
+521
\ No newline at end of file
diff --git a/internals/manifest.js b/internals/manifest.js
index 40a8d25..6d4b59b 100644
--- a/internals/manifest.js
+++ b/internals/manifest.js
@@ -91,8 +91,8 @@ var m = {
 		let temp = [...value]
 
 		//Firefox do not support 'activeTab' as expected
-		if (global.platform == "firefox")
-			temp = temp.map(v=>v=='activeTab' ? 'tabs' : v)
+		//if (global.platform == "firefox")
+		//	temp = temp.map(v=>v=='activeTab' ? 'tabs' : v)
 		
 		// maybe need also:
 		// "*://*/*",
diff --git a/src/config/manifest.json b/src/config/manifest.json
index 7d35287..18a8fad 100644
--- a/src/config/manifest.json
+++ b/src/config/manifest.json
@@ -69,7 +69,7 @@
   "permissions": [
     "contextMenus",
     "notifications",
-    "activeTab"
+    "tabs"
   ],
 
   "content_scripts": [