That sounds like it should work. Do you have Private Browsing turned on by any chance. If the tabs aren't restored try the History menu for "Restore previous session" (though it would probably be grayed out for you as my guess). check these out -- I will be mostly away for next 20 hours. See item #31 [http://dmcritchie.mvps.org/firefox/firefox-problems.htm#tabslost Restoring tabs from a lost session] Also see [https://support.mozilla.com/kb/Firefox%20does%20not%20ask%20to%20save%20tabs%20and%20windows%20on%20exit Firefox does not ask to save tabs and windows on exit | Troubleshooting | Firefox Help]

Make sure that you do not use [[Clear Recent History]] to clear the 'Browsing History' when you close Firefox. * [[Firefox does not ask to save tabs and windows on exit]]