Firefox: Mute Media
You middle-click a few youtube videos and all start shouting against each other. You enter a website and it immediately slaps sound in you face. How annoying…
But there may be help.
about:config and set
trueto only play media that is also in the current tab an do not play the stuff from the background
falseto stop autoplaying of some of the media (doens’t work everywhere, not sure why..)
dom.audiochannel.mutedByDefaultsets the audio muted by default – essential for offices
plugins.click_to_playrequires a click to run plugins, such as flash (which you are anyway not using!)