The Google Toolbar may not yet be marked as compatible with Firefox 5.0. After all, it is still an alpha2 version program at this time.

Please let me know when Google Toolbar is compatible with Firefox 5.0

Thank you

Samir

You can ask about that in the Google Toolbar forum.
http://www.google.com/support/forum/p/Toolbar?hl=en

You could try using the method described in this article to override an extension which isn't compatible with Firefox 5.0: http://www.makeuseof.com/tag/how-to-make-any-firefox-add-on-compatible-with-all-versions/

Also, look at this add-on: https://addons.mozilla.org/en-US/firefox/addon/add-on-compatibility-reporter/