I personally don’t understand the logic of attempting to restore the sites that just crashed your browser. :/ On the Mac, a slow site can tie up Firefox for minutes and make it unusable. Restoring those sites after forced quit is so frustrating. I found this online as a solution.
Following steps will be helpful to prevent Firefox from restoring previous sessions.
- In the Location bar, type about:config and press Enter.
- The about:config “This might void your warranty!” warning page may appear. Click I’ll be careful, I promise! to continue to the about:config page.
- In the Search box at the top, type browser.sessionstore.resume_from_crash.
- In the resulting grid, double-click on browser.sessionstore.resume_from_crash to set it to false.
That’s it! :) happy happy joy joy!