Which Tab In Firefox is Playing Sound?
We haven’t found an easy way to determine which tab the sound is coming from, but the reason anyone wants to know that is usually to shut off the sound from that tab. Maybe the Firefox add-on “Stop Autoplay” will work for you: this add-on prevents audio from automatically playing when you enter a website.
>>Update: Stop Autoplay hasn’t been updated recently, but you can now download the Muter add-on, currently for PC only. Once installed it adds a mute button into the add-on bar in the lower right corner. For Chrome use extension MuteTab.
The way you would use this is to install this Firefox add-on, enable its settings in preferences, then close Firefox while saving all the tabs, or better yet, bookmarking all of them, and then re-opening Firefox. All tabs should be silent now. Hurray!
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