Firefox has had some security problems lately and some days ago 3.6.6 was pushed out.
For many of us, this breaks firefox: it will not start up anymore. After some digging I found out that moving away the file ~/.mozilla/firefox/PROFILENAME/secmod.db solves the problem.
Thought I should scribble it down in case you have the same problem... and what fun is a blog post without a picture? :-)
Testing my new Nikon 70-