After your computer restarts, you should be able to choose "Restore Previous Session" from Firefox's History menu to restore all your tabs and groups from last time.

For this to work, Firefox must be set to remember history in the Settings for privacy, browsing history and do-not-track.

Are you using "Show my windows and tabs from last time"?
That usually works better.

• Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

Hi cor-el

Yes I have this option up and going, my tabs come up each time I load Firefox. Its only when an automatic update from windows or Microsoft Security Essentials gets uploaded that I have the problem, which doesn't happen with all the updates, only some of them.

Hi mbrubeck

I will try your suggestion of the restore previous session and see if this works next time it happens.

Thanks