Right now I have this bug in Firefox where the results from the drop down menu are incorrect. As in, if I get an autocomplete result that is several lines down

Right now I have this bug in Firefox where the results from the drop down menu are incorrect. As in, if I get an autocomplete result that is several lines down - say, foobar.com - and I click on it then I'll be taken to barbar.com. If I click on the result that is several lines above foobar.com then I get foobar.com. I don't know how to explain this correctly.