Currently being used to emulate Mute Tab Shortcuts for Chrome, because Firefox didn't have a similar extension.
Hotkeys: Keys Function Alt+1 Toggle audio of current active window Alt+2 Mute all audible windows except current active window Alt+3 Toggle audio of all audible windows
Changing Hotkeys: - Click Extensions icon in top right of Firefox window - Click Manage Extensions at the bottom - Click gear icon towards the top of the page - Click Manage Extension Shortcuts at the bottom - Rebind to whatever you want
