(Mac) On the menu bar, click on the Firefox menu, and select Preferences.(Windows) At the top of the Firefox window, click on the Tools menu, and select Options.To have Firefox restore previous window after any closing of Firefox (crash or no crash) Find DestroyFirefoxSession.sh on your Desktop and double click.Check the box next to Execute: Allow executing this file as program.Right click on DestroyFirefoxSession.sh and click Properties.then, assign permissions to the new DestroyFirefoxSession.sh file so that it can be executed (run).Save the file, then it on your Desktop.Save in folder: Drop down menu select: Desktop.If it does work, it will permanently delete your last session. WARNING: there's at least two things wrong in that code, I'm too tired to fix it, so maybe don't use this until someone fixes it.opt/Firefox/Firefox' into the new blank gedit window. paste ' *rm /home/USER/.mozilla/firefox/fault/sessionstore.js.and add the following code to it: rm /home/USER/.mozilla/firefox/fault/sessionstore.js.create a new shell script file with a text editor of your choice (such as gedit).Script to manually disable in Debian or Ubuntu Close and restart Firefox, and it should not warn you any more (but it does).Type _from_crash in the filter box, or search for it manually iny.Open about:config in the Firefox location bar.Restore Session Disabling crash recovery feature You can restore the tabs and windows from your previous session, or start a new session if you think the problem was related to the pare you were viewing. You last Firefox session closed unexpectedly. 2.2 To have Firefox restore previous window after any closing of Firefox (crash or no crash).2.1 Script to manually disable in Debian or Ubuntu.

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