I too love firefox (ff) ! Specially for its awesome bar which is now present in every other browser. Now if ff could be tuned so that it is not such a memory hog!
I say memory hog because just 5 tabs of light pages [meaning just plain HTML pages, no flash anywhere, but some images] and with just one addon [Forcastfox - just can't live without it!] ff has a private working set of 93,124 KBytes (90.9 MB).
Also, would love it if ff improved its compatibility because some sites which are designed for IE 6 screw up on positioning when in ff. For example:
www.mu.ac.in - The Mumbai University website.
But nothing beats the simplicity that ff brings to the table!