Newbee2
One of the problems I have found when a browser has been contaminated or "jacked", as yours has, is that most of the anti-spyware and clean up apps, such as Ad-Aware, will only work with Inetrnet Explorer. Other browsers, such as Opera, Mozilla, etc., do not get a look in.
You see, I used to use Opera, as well as IE, but found that although both browsers got contaminated with spyware cookies I could only effectively get IE cleaned up.
All I can suggest, at this time, is to contact Mozilla directly and ask for their advice. Once you have your browser cleaned then install SpywareBlaster (Free) to prevent further contamination. Here's the URL:
http://www.javacoolsoftware.com/spywareblaster.html
Unfortunately, SpywareBlaster can protect your browser from being infected with ad and spyware but cannot clean a browser after contamination.
Hope this helps
UK Bob (aka Shark Chum)