Firefox wont open?

[touch]

I have ubuntu on my laptop.
I did the auto update thing and now i cant open firefox. I click on the icon and it appears in the taskbar for a couple of seconds then goes. The window does not open.

I have tried re-installing it through package manager but that hasnt helped.

Is there a way i can restore my computer back to what it was before? (like system restore on windows)

 

[touch]

Open up a terminal window and type 'firefox' hit enter and post the output in here.

I did this and put the output in google.
It was caused by an update to one of my add-ons, just need to figure out which one now

Thanks for your help guys.