Migrate Mozilla

I’m migrating to a fresh install of XP, hoping to fix persistent problems like bluetooth not working and other fun stuff. Of course this means reinstalling everything and trying to get prefs files back. Firefox gets a lot of customization, so it sucks…
I got:
“Alert Could not initialize browser’s security component. The most likely cause is problems with files in your browser’s profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the browser and fix the problem. If you continue to use this browser session, you might see incorrect browser behavior when accessing security features.”
It was a profile migration problem and the offending file was “cert8.db” deleting the old version and reinstalling firefox, which recreates the file solved it. .