exclude Hangouts: sadly, can't speed up live meetings :(

manifest.json

@@ -23,6 +23,7 @@
   "content_scripts": [{
       "all_frames": true,
       "matches": [ "http://*/*", "https://*/*"],
+      "exclude_matches": [ "https://plus.google.com/hangouts/*" ],
       "css": [ "inject.css" ],
       "js":  [ "inject.js" ]
     }