So, you wanted to upgrade your browser? Firefox 1.5 came out just an hour ago! Download it here:
Hopefully, the memory leaks are fixed (Tekno wants to leave his firefox open overnight...).
And, after you have downloaded the very new firefox 1.5, don't forget to try this First Person Shooter Game that is pure HTML and doesn't work with any other browser yet, except Firefox 1.5. It's based on the "Canvas" tag.