Be Quiet Silences All But One Audio Feed in Your Browser
Firefox: There are few things more grating than having music playing in one browser tab while you try to watch a
Once the app is installed, it works in the background to silence one
Unfortunately, the extension has only been tested to work with YouTube, Pandora, and Last.fm, so this might not cover every edge case, and it tragically won't mute obnoxious Flash ads for you. It's tough to complain though, because it works like it should, and it runs in the background so you never have to remember to enable it. If you're a Firefox user, it's definitely worth checking out.