I'm afraid it may be too late. I had Firefox running, multiple tabs in 4 windows. I didn't notice exactly when Firefox ended.. I first installed some installation software that wasn't needed. Unchecked all the extra junk, ie. change my homepage. Didn't start it, haven't yet uninstalled it. I then downloaded and installed uTorrent. It was when uTorrent completed installation that Firefox started.. with just one window/tab with my homepage!!!! My settings are still set to open windows and tabs from last session! I remember there being a backup of open windows/tabs somewhere, and I can just change the extension. Hopefully the backup is still the backup of the 4 windows. Help please! What's the name of the file(s) to look for?