This addon protects you from sites that automatically play loud or annoying sounds by muting all sites that aren't specified in the whitelist.
Muting or unmuting a site will update the whitelist accordingly. This behavior can be disabled on the preferences page if you often want to mute/unmute sites temporarily.

When manually adding sites to the whitelist, you can use * as a wildcard character. *.reddit.com matches all of Reddit's subdomains and www.google.* matches Google for arbitrary top-level domains for example.

In order to mute/unmute a site you can

• click the speaker symbol on the tab
• right-click the tab and select 'Mute Tab'/'Unmute Tab'
• press ctrl+M while you're on the tab
• edit the whitelist on the addon's preferences page

Install

• License: GNU General Public License v3.0 or later
• Weekly downloads: 56
• Average daily users: 3456
• Rating: 4.6716/5 of 67 ratings
• Created: 2017-08-20 21:03:56
• Last updated: 2018-05-17 16:20:08
• Homepage: https://github.com/abba23/mute-sites-by-default
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/mute-sites-by-default/
• API: @mute-sites-by-default