(3) The _windows_undo preference defaults to 3 but you can increase that if you like. (2) In the search box above the list, type or paste sess and pause while the list is filtered Click the button promising to be careful or accepting the risk. (1) In a new tab, type or paste about:config in the address bar and press Enter/Return. To check your closed window recovery depth: If you get any kind of recovery, this probably is fine. It's best NOT to check the box for 'Clear history when Firefox closes' but if you do, the Settings button to the right will become enabled and you can make sure you aren't clearing Browsing & Download History. I think it started in Firefox 67, and some improvements hopefully were made for Firefox 68.įirefox will: Use custom settings for history

Hi nordvie, Firefox has been much more sensitive to system/power out crashes recently. Should I be doing anything differently to have the session restore functionality as you've described' It'd be nice to have a 1-step 'Clear History' that would clear what I wanted it to, but otherwise honor the same settings as the 'Clear when Firefox closes' but I wanted to avoid clearing anything in the event of a power outage. It seems the last update might have re-set to a hard clear? It'd be nice to have it clear everything else, but I hadn't time then to read up on it. I had when the new interface presented on update, temporarily checked Clear history when Firefox closes, and under the Settings Button unchecked Download & Browsing History, Active Logins and Offline Website Data, then 'unchecked' the Clear History box. There's a button to 'Clear History' but it doesn't appear to have settings available. Under Options, at General, I've set to Restore to previous session and at>History to use custom settings, and save Browsing and Download history. Where do I go, please, to be sure I've done everything possible to set it to store session history? Sometimes, despite my exiting step-by-step, I get just the last window (usually an empty e-mail response in progress if not just initial tabs.

Firefox reopen closed window