Is that an add-on, or a search engine? Type '''about:addons'''<enter> in the address box to open your Add-ons Manager. Hot key; '''<Control> ''(Mac=<Command>)'' <Shift> A) ''' In the Add-ons Manager, on the left, select '''Extensions. ''' Make sure you know what each one is and what it does. -------------- Type '''about:preferences#search'''<enter> in the address box. You can select any search engine to be your default from here. You can also remove any engine from here.

See also: *https://support.mozilla.org/en-US/search?product=firefox&w=2&q=QuickForms