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Start/stop GIF animations through a keyboard shortcut or by clicking them. You can also restart animations from the beginning, or disable animations by default. (For WebExtension status, see: https://github.com/simonlindholm/toggle-gifs/issues/43 )
SuperStop adds a Shift+Esc shortcut that stops background requests and animations even when the Firefox Stop button is disabled.
Linkifies addresses in your Location bar (fork of Locationbar²).
Access closed-over variables in the Firebug console. (Obsolete - use Firebug 1.11.2 instead.)