Title: Automatically mute your Firefox tab
       Author: Solène
       Date: 17 August 2016
       Tags: firefox
       Description: 
       
       At work I have the sound of my laptop not muted because I need sound
       from time to time. But browsing the internet with Firefox can sometime
       trigger some undesired sound, very boring in the office. There is the
       extension **Mute Tab** to auto-mute a new tab on Firefox so it won't
       play sound. The auto-mute must be activated in the plugin options,
       it's un-checked by default.
       
       
       You can find it here, no restart required: [Firefox Mute Tab
       addon](https://addons.mozilla.org/fr/firefox/addon/mute-tab)
       
       I also use **FlashStopper** which block by default flash and HTML5
       videos, so you can click on it to activate them, it doesn't autoplay.
       
       [Firefox FlashStopper
       addon](https://addons.mozilla.org/en-US/firefox/addon/flashstopper/)