Restores the ‘List all Tabs’ button in Firefox 12.
Compatibility 
Works with: Firefox 12.0+
Background
The ‘List all Tabs’ button was removed in Firefox 12 as per Bug 714281.
The Tweak
To restore the ‘List all Tabs’ Button you will need modify your userChrome.css. Add these lines to your userChrome.css file located in your profile folder:
/* Show "List all Tabs" Button */
#alltabs-button {visibility: visible !important;}The ‘List all Tabs’ button should be restored when Firefox restarts.
Updated: January 15, 2026
