Install NoScript: https://addons.mozilla.org/En-us/firefox/addon/noscript/ Before opening any new pages, have NoScript set to "Forbid Scripts Globally" When on the page you want to see, click the "Temporarily allow all this page" It will re-load the page, and the broadcast will work If something doesn't work on a page, it's probably because you have it on "Forbid" Ad Block Plus is the other one I use: https://addons.mozilla.org/En-us/firefox/addon/adblock-plus/?src=search