Upon restarting my browser today, I was greeted with this , I would say the most honest answer I have ever got from developers. Previous versions of Mozilla used to automatically give the option of starting a new session or restore. However, with the coming of version 3.5 Firefox selectively picks the tabs to restore and sometimes you can be faced with repeated crashes.

How to Get rid of it ?
utinely have dozens of tabs open at once.

To make that change, enter

about:config

and click through the “Here be dragons” warning (another example of Firefox being a tad too clever). Use the filter to find the

browser.sessionstore.resumefromcrash

flag, right click, and select Toggle to switch it off.