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Disable Firefox Microphone/Webcam Widget

Old instructions

Whenever you’re using the micrphone or the webcam in Mozilla Firefox, it displays a little widget at the top of your display. This little widget can be annoying. Here’s how to get rid of it:

1. Enable “legacy” user styles in about:config:

   toolkit.legacyUserProfileCustomizations.stylesheets
   

2. Add the following to ~/.mozilla/firefox/your-profile-folder/chrome/userChrome.css (create it if it doesn’t exist):

   /* Add the following line at the top of the file if it doesn't already exist. */
   @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
      
   #webrtcIndicator {
       display: none;
   }
   

3. Restart Firefox

New instructions

Don’t prompt me every time I try to share my screen whether it’s okay.

media.navigator.permission.disabled true

Disable the floating bar that tells me I’m sharing my screen.

privacy.webrtc.hideGlobalIndicator true
privacy.webrtc.legacyGlobalIndicator false

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