Jim,
Good suggestion, but when I checked the cookies, there were none from Mozilla or Firefox.
Thanks, Jack
Edited to add: "The tried and trusted good old 'Delete the .plist file stupid" !
I deleted the org.Mozilla.plist file and VOILAAA!.
No more of those annoying interuptions and messages!
Thanks for the hint Jim! I just had to wake up and take the clue.
- Jack