So, I recently installed firefox 5 on my windows machine and the only search engine I can use in the search box at the top right is aol search. I recall in Firefox 4 you could use wikipedia, or google and so on. AOL in fact wasn't even an option! I'd really like to get google back, but can't figure out how to do it. It's not an option in manage search engines, nor does it pop up when I 'get more search engines'.
All the articles I can find are to do with non functioning google toolbars, not the search box which is part of the basic firefox setup.