Have you read the article, Preferences are not saved ? It might be able to help you out with this.

Went through your suggestion link and got no help and BTW, I have TWO different computers running Linux Mint v12 with Gnome3/Cinnamon and BOTH are doing the exact same thing??

I see two other ppl have stated that they have the same problem?

Bug in Firefox or Gnome3/Cinnamon??

Thanks

It is possible that there is a problem with the files sessionstore.js and sessionstore.bak in the Firefox Profile Folder.

Delete the sessionstore.js file and possible sessionstore-##.js files with a number and sessionstore.bak in the Firefox Profile Folder.

• Help > Troubleshooting Information > Profile Directory: Open Containing Folder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

Deleting sessionstore.js will cause App Tabs and Tab Groups and open and closed (undo) tabs to get lost, so you will have to create them again (make a note or bookmark them).

See also:

• http://kb.mozillazine.org/Session_Restore
• http://kb.mozillazine.org/sessionstore.js
• http://kb.mozillazine.org/Multiple_profile_files_created

FYI, I went in and changed the name of those two files to .old. Closed out the browser then reopened it and tried to close with two tabs open and got the warning. Checked the box to not notify me again, quit and reopened and tried to close again with two tabs open and still got the warning???

So, I went back into "Open Containing Folder" and checked and there were two new files there, ie, sessionstore.js and sessionstore.bak along with the two original files I renamed to .old. So Firefox made two new files on it's own with around 25k bytes of data in them but I still have the same problem.

What next?

If prefs change then you need to check for problems with prefs.js.
If you have a user,js file then all prefs in that file are set accordingly each time that you start Firefox , so changes from the previous session are lost and you need to remove them from user.js if you want to change them permanently.

• http://kb.mozillazine.org/user.js_file

Know what? This is getting to be more complicated than I want to mess with as I got more important things to do than rebuild a browser to try to get rid of what is obviously a bug in someone's software. Neither Opera nor Chrome seem to have this problem??

Maybe someone there will fix it in the next release of Firefox!

I'm done!

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

• https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:

• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

One last reply on this..........Firefox 12 was included in daily updates from Mint yesterday and there was joy in muddville thinking this bug was fixed!! IT WASN'T??

So does Mozilla consider this a Linux Mint issue or what??

And while I'm complaining, I use the "old location bar" and in that dropdown menu, the MOST frequently used sites normally wind up at the top of the list? NOT ANY MORE? Still works on Winders and Ubuntu but not in Mint running Cinnamon? Is this another bug for Mint or Mozilla where Cinnamon/Gnome3 is concerned???

I installed Linux Mint 12 on three different computers this month (with Gnome and/or MATE), and all have this same problem. I guess we can easily conclude the fixing has to come through a global patch.

UPDATE: Downloaded Ubuntu 12.04 last week. Install that on a "mule box" then installed Cinnamon desktop and this problem is NOT seen in Firefox Browser on that OS/Desktop.

Having said that, one could "assume" that the problem lies within Linux Mint, not Firefox or Cinnamon.

Will post this problem in the Mint forum.

So as far as Firefox is concerned, I guess we could consider the issue "resolved" but not fixed since that will have to be done by the Linux Mint group.

And BTW, Ubuntu 12.04 looks good with the Cinnamon desktop!  ;-) Probably a "keeper"!