You can go to the following page and choose the one you want to add; probably one of the items in #11. Major Engines: http://mycroft.mozdev.org/search-engines.html?name=google.co.uk See:<br /> * http://support.mozilla.com/en-US/kb/Search+bar * http://kb.mozillazine.org/Search_Bar

   add the addon
   go to google.co.uk
   right click (or control click if mac) on the google.co.uk search box
   the select "add to search bar" 

for google.co.uk form search box: this app allows searching to any website search box (very good) so set it to Google.co.uk https://firefox.maltekraus.de/extensions/add-to-search-bar add the addon go to google.co.uk right click (or control click if mac) on the google.co.uk search box the select "add to search bar" --- for search google.co.uk from address bar 1. Type "about:config" in address bar, and click 'I Promise'. 2. Type google in the top box 3. scroll down to Keyword.url (near the bottom) 4. click and carefully change the .com to .co.uk (see below) http://www.google.com/search?sourceid=navclient&hl=en-GB&q= http://www.google.co.uk/search?sourceid=navclient&hl=en-GB&q=