Lastly, "Windows-like" in that like in Windows every single application with a text box has a slightly different implementation of the text box than every other application, and "global" services like spell checking (does FireFox use my OS dictionary?), dictionary lookup, text services, etc, are unknown. That's the Windows Way, built and fostered by a non-extensible UI toolkit. I use a Mac because I find it annoying to maintain a spell-check exceptions list in every application, for instance.
I don't think firefox uses OS X's dictionary as many words I typed got the red underline even though they were fairly common words and were spelled correctly. In text edit and safari the words didn't get the red line.
firefox is a good browser for platforms like Windows (because the alternative is Explorer) and Linux (because it comes with most distros) but it really has no place in OS X.