I love Firefox on the N900, Weave sync has been working perfectly for me, and the N900 has enough RAM for all my tabs/bookmarks compared to the N800 where Firefox soft crashes frequently with an out of memory error.

My BIGGEST beef, and this is the one that is going to have me Browser Switchboarding right back to MicroB, is the inability to highlight text. I can't STAND the fact that I look up code for a quick fix on the N900 and then I have to keep tabbing back and forth between the webpage and the terminal to manually enter in all the code.

To the user that mentioned desktop bookmarks, these also work with Firefox if you use Browser Switchboard to change the default browser to Firefox.