Quote:
(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.
(2) In the search box above the list, type or paste sess and pause while the list is filtered
(3) Double-click the browser.sessionstore.max_resumed_crashes preference and change the value from 1 to 0 and OK that.
|
https://support.mozilla.org/en-US/questions/1019654
This might do it for you.