Hi, You can try to '''Disable''' or '''Remove''' the add-on via '''Tools '''('''Alt '''+ '''T''') > '''Add-ons''' > '''Extensions''', if it is listed. [http://kb.mozillazine.org/Problematic_extensions Problematic Extensions] [https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes Troubleshooting Extensions and Themes] [http://support.mozilla.com/en-US/kb/Uninstalling+add-ons Uninstalling Add-ons] [http://kb.mozillazine.org/Uninstalling_toolbars Uninstalling Toolbars]