Note: This extension has only one feature, and it works. But you should also check out this other extension which includes that feature and much more:
https://addons.mozilla.org/en-US/firefox/addon/grasshopper-urls/---
This extension allows you to go to a tab that is emitting sound.
Tired of having a hard time looking for the tab that has the playing icon to go to the thing you were watching or listening to?-
Sometimes you have lots of tabs open and finding the tab that's playing can be a hassle.
This extension solves that problem by allowing you to go to the tab that is playing audio by simply clicking a button or with a keyboard shortcut.
Simply click on the button in the toolbar and you will go instantly to the tab that is playing audio.
It works with different windows too. You can be in Window A and if something is playing in Window B, Window B will be focused in the playing tab.
It also has an option to close tabs emitting sound.
