Another reason to browse with the Mute Tab add-on enabled: https://addons.mozilla.org/en-us/firefox/addon/mute-tab/ https://addons.mozilla.org/en-us/firefox/ad

Another reason to browse with the Mute Tab add-on enabled: https://addons.mozilla.org/en-us/firefox/addon/mute-tab/ https://addons.mozilla.org/en-us/firefox/addon/mute-tab/ All tabs default to muted, and you can selectively un-mute tabs or whitelist sites as needed. I've certainly appreciated the default state of pages being muted.