-> Restore previous session - Configure when Firefox shows your most recent tabs and windows

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Ok, I found this and yes this works. However, previously FF would automatically restore tabs on restart, which seemed most user friendly. I've also found that by setting 'Show Windows and Tabs from last time' (which previously I'd set to 'Show Home Page' when tabs were restored) in Preferences->General it now ignores Preferences->Tabs "Warn me when closing multiple tabs', ie with multiple tabs open on Close no warning box is displayed. Whichever way you look at it this sounds like a bug has been introduced.

"Warn me when closing multiple tabs" gives you a warning when you close a window (that contains multiple tabs) by clicking the Cross 'X' button of a window. It doesn't show this warning when you close Firefox by clicking Firefox button -> Quit/Exit or by simply shutting down your system. This is the default behavior in Firefox 4+ versions.

If you want the old Firefox 3 behavior of saving tabs before closing Firefox, perform the suggestions mentioned by dankyhelpedyou in his first Reply in the following thread:

• https://support.mozilla.org/en-US/questions/796107#answer-151751

Check and tell if its working.