Mute New Tabs
Many sites auto-play videos, send fake chat messages and create general nuisance while listening to music. This add on mutes all newly opened tabs.
What is Mute New Tabs?
Mute New Tabs is a Firefox add-on that mutes all newly opened tabs to prevent annoyance from auto-playing videos, fake chat messages, and general disturbances while listening to music.
Mute New Tabs is safe to use. It does not request any sensitive permissions.
Mute New Tabs has earned a fairly good reputation and likely can be trusted.