I think you can get it to work as well as you had it 4.0 by using the Add-on Compatibility Reporter. '''The Google Toolbar is no longer supported by Google in Firefox 5 and up''', you may be able to get what you want from it for a limited time, the directions to install the Google Toolbar were posted before Google actually announced dropping support. *Enable Google Toolbar in Firefox 5<br>http://googlesystem.blogspot.com/2011/06/enable-google-toolbar-in-firefox-5.html *the-edmeister posted a brief evaluation of the situation<br>https://support.mozilla.com/en-US/questions/841736 In any case you can find several alternative solutions, see * "'''Using Google Toolbar features without toolbars'''" <br>http://kb.mozillazine.org/Using_Google_Toolbar_features_without_toolbars