Ok so first obvious question, if you prefer FF, why don't you just use that?
Secondly, I would run a good virus scan program and this Malwarebytes.org
to rule out viruses and spyware.
Thirdly, there is a raft of reasons for that error message and consequent shutdown and it is pretty hard to diagnose without going through a lot of methods. Hopefully there are other members who can offer solutions. A quick google does come up with a number of things you can try