Active Stop Button is designed to stop gif animation with button, context menu or Esc key.

Features list:

• Separate Stop and Reload buttons^[1] like it was in old vanilla Firefox
• Make Stop button be always active to stop gif animation
• Reenable Stop item in right-click context menu
• Safely revive ability to stop animation with Esc key
• Stop^[2] all tabs with single click, double click, ctrl+click or right click on Stop button

^[1] If you need to uncombine Stop/Reload buttons from the location bar, put "Zero space" separator between or before them.
^[2] There is an option to stop AJAX along with gif animation on all tabs (use with caution!)