Could firefox be updated to 4.0.1 ? 3.6.15 is slow and buggy (at least since the kernel or some other package was updated).
I tried to compile it myself but failed
$this->bbcode_second_pass_code('', 'checking size of int *... 0
configure: error: Unexpected pointer size
')
Don't know why it does it, but I don't want to spend too much time figuring out what the problem is, especially if Arch Linux ARM guys already figured it out before.