Along with the included session saving magic is this classy key combo. After getting over zealous with CTRL+W, this one brings back tabs inadvertently closed. It even puts them back in the same order and works cross session, which could possibly be dangerous. You can right click to get an option for this in the context menu, but that’s no fun.
I’m more of a keyboard navigator than mouse (see above) so it took me a long time to notice this one. FF2 hides tabs behind left/right arrow buttons once two many are opened to clearly display the titles. With the pointer over the tab bar, the scroll wheel navigates through the listing. Nicety.
Seems a lot of people have been a bit down on FF2 and at first I saw it as mostly the inclusion of a bunch of things I used to do with extensions. Turns out they’ve actually improved upon them in the process. That or I just never noticed their full functionality before.