In order to remove the toolbar from Firefox Mozilla, the following steps have to be taken:
· Start Firefox
· Under Tools go to Extensions and click on this field – this should launch a new window from which you can select the extension you wish to uninstall

· Click on the Uninstall button – this should remove Site Inspector from your Firefox installation.
Site Inspector is a powerful HTTP-client/server test application designed to pinpoint critical performance issues in your web site or web server that may prevent optimal experience for your site's visitors.