firefox crashes in user but ok in root

[hacker]

I'm having frequent crashes of firefox every time I go to anything
with flash in it.  It does not happen, however, if I'm in my root
account.  I've tried completely deleting my ~/.mozilla preferences,
but it has no effect.  Also, I've tried 'apt-get --reinstall' but that
doesn't help either.

Anyone else encounter this or have a suggestion how  to fix it?