looks like your browser profile was damaged in the Mac OS X
crash. There may be a deeper problem in your system. I would try
the following, in that order:
1) Apple hardware test, esp. RAM test (it's on the DVD/CDs that
came with your Mac, instructions are printed on the CD/DVD, usually
you hold down the option key during startup)
2) If hardware test turns out okay, open Disk Utility, select your
main HD in the sidebar, click First Aid, then Verify Disk. You will
have to insert the Install disc and start Disk Utility from there
to make repairs if necessary.
3) If problems are fixed or there aren't any, start TenFourFox. If
it keeps crashing when surfing the web, click
Help>Troubleshooting Information, and Reset TenFourFox (top
right on the page).
Let me know if this helps. If it doesn't, there are other steps
we can try.