Rated 5 out of 5 stars

I've been using this 'addon' for a very long time but it wasn't working as it should anymore, so I modified the XML to this URL and it seems to be working now, you should try it and update the addon if it comes to it
https://www.google.com/search?hl=en-US&gws_rd=cr&q={searchTerms}

'&hl=en' wasn't working the same way as before, so I changed to en-US(not sure if needed, just a glitch maybe), and it looks like 'gws_rd=cr' makes it stick with whatever domain you're using.