I actually prefer fltdj to kopi..much faster.
Firefox loads more slowly than opera. it loads pages about as fast. It opens its own menus (like preferences) more slowly. It is perfectly useable on pdaxrom--I found it unuseably slow on xqt, if that helps. Firefox has more of a future than opera, in that new versions can be built, and extensions and plugins (like gplflash, or evn vlc) can be used. My solution is to keep a couple browsers available:
Firefox for secure or complex or media rich stuff
Dilllo for quick casual browsing (as fast or faster than opera, usually good rendering, no ssl)
links (links -g) as a quicker lower bandwidth (and sometimes more stable) alternative to dillo.
you will probably find that you'll want a swapfile with firefox, though it is not necessary by any means.
laze: 2 months? I'll have to put red and green leds in it .....