Does that only happen if you start Firefox?
Which page(s) open if you click the Home button?

See these articles for some suggestions:

• https://support.mozilla.org/kb/Firefox+has+just+updated+tab+shows+each+time+you+start+Firefox
• https://support.mozilla.org/kb/How+to+set+the+home+page - Firefox supports multiple home pages separated by '|' symbols
• http://kb.mozillazine.org/Preferences_not_saved

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 [2] file and possible sessionstore-##.js [3] 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:

• [1] http://kb.mozillazine.org/Session_Restore
• [2] http://kb.mozillazine.org/sessionstore.js
• [3] http://kb.mozillazine.org/Multiple_profile_files_created

cor-el, I shall get around to doing all you suggested ... after I get back from hols. I shall report back in due time. Thanks for your reply and a Happy New Year.

Hi again, I solved the problem! :)

I deleted 2 files

user.js

prefs.js

and bingo, all is well.

Thank you so much, it worked great. It also stopped it from checking the addon thing.

Thank You,

Hi all again, FF just upgraded to 13.0.1 and ..... you guessed it ...... the same thing happened as before .... that annoying tab opens "Hooray! Your Firefox is up to date." and it won't go away.

Fortunately, the same cure is available, simply delete the 2 files

user.js .......and ..........prefs.js

by clicking on 'Firefox' top left corner then point at 'Help' click on 'Troubleshooting Information' under 'Application Basics' you will find 'Profile Folder' click on 'Show Folder' locate the 2 files and delete them.