diff --git a/manifest.json b/manifest.json
index 8624855..376c79d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -20,7 +20,8 @@
         {
             "run_at":"document_start",
             "matches":["<all_urls>"],
-            "js": ["content.js"]
+            "js": ["content.js"],
+            "all_frames": true
         }
     ],
     "browser_action": {