CSS - :-moz-user-disabled
The :-moz-user-disabled CSS pseudo-class matches elements representing images that were not loaded because images have been entirely disabled by the user's preferences.
Description
The :-moz-user-disabled CSS pseudo-class matches elements representing images that were not loaded because images have been entirely disabled by the user's preferences.
This selector is intended for use mainly by theme developers.
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/css/:-moz-user-disabled