I accidentally deleted wikipedia from the search bar up in the top of my browser. I want it back, but for some reason I can't get it back. I have checked the help section for this, and I have not found the solution. I also opted to just restore Firefox to default settings, but for some reason, that is not listed in the help section either. So I tried just uninstalling and reinstalling. No luck there, either. Can somebody please tell me how the hell I'm supposed to fix this?