I've trawled through a few forums and threads and followed the info on unchecking the FF session button in CC's applications tab, but it still removes the last session tabs which I usually like to keep. The FF setting is still to start each session with the last session's tabs. I'm sure there's something simple I've missed.
I do find it a bit annoying as a long time CCleaner user, that this setting to remove the last FF session became a default setting with CC without any warning. I lost quite a lot of time trying to recover lost sessions from my memory and sites which were very useful in some research I was doing.
I just tested it on mine with "Session" unchecked and it didn't delete the tabs. I have FF 3.6.9 and CCleaner 2.35.1223. I'm using FF's native session manager. Do you use FF's session manager or one from an extension like Tab Mix Plus? If you're not using Tab Mix Plus you might give it a try. Or if you are using it, disable it and see if that makes a difference. There could be a conflict between it and CCleaner. Make sure both CCleaner and FF are current. Uninstall and reinstall CCleaner if you have to. You could always uninstall and reinstall FF but I'd only do that as a last resort.
I totally agree that the Firefox Session option should not be checked by default.
I'm still using FF 3.6.3 and was using the FF session manager. The CC is the latest update which started this issue. I might try updating FF first to see if that helps.
I had FF set for auto updates, but it hadn't done them for a while for some reason. Anyway, the update didn't work, and even worse, simply closing FF without using CC kills off my last session even though I have the right setting in OPTIONS selected...
...this is weird.
Never happened before and I've been using FF and CC for years. I'm not very geeky when it comes to comps so can't think of what else could fix it. I like to use the restore session feature a lot; saves on having to make lots of unecessary bookmarks and time opening and selecting the right bookmarks.
If you have any extensions or themes installed, you should probably run FF in safe mode and see if it still does it. Go to Start>Run and type "firefox.exe -safe-mode" without quotes and click OK. When the dialogue opens, click "Continue in safe mode." FF will open in safe mode with all extensions and themes disabled (except the default theme). Open a couple of tabs and then close FF saving the session. Then reopen in safe mode. If it works right, then it's probably one of your extensions conflicting with CC or maybe causing a problem all on its own.
In Vista and Windows 7, the Run command may not be on the Start Menu by default. You might have to Right-click Start>Properties>Customize>Scroll down the list to "Run command" and check the box>OK.
If all else fails I would try the Tab Mix Plus extension for FF. It has an excellent session manager that you might like even better.