How to Uninstall Firefox Toolbars
If you're using Firefox and you're tired of whatever toolbar you've recently installed—or had unwittingly installed for you during another software installation—you can get rid of that toolbar with a few easy clicks.
Under the option "Tools," click "Add-Ons."
In the new window that opens, click "Extensions."
Select the toolbar you'd like to remove and click "Uninstall." Firefox will ask you again if you want to uninstall the toolbar. Click "Uninstall."
To complete the uninstall, restart Firefox.