Alas, Firefox on OSX has been really good, and thanks to a TekZilla podcast, it’s even better. A major gripe I’ve had for quite a while, was Firefox’s inability to tab to dropdowns. Apparently, the boys at Mozilla are pulling the keyboard preferences and applying them to form fields.
As you can see in this screenshot, if you select “All Controls”, you can now tab to those pesky dropdowns.
Personally, I think Mozilla should get a bit smarter about this like Safari does, and if you’re in a form … I don’t know … use some common sense?