I have had various versions of BitDefender installed on my system, and none have affected the way Firefox works, including BD 2009. However, BD 2010 prevented any of my add-ons or extensions from loading when I opened Firefox. I uninstalled BD 2010, but Firefox still could not load my extensions. I have since found from the Firefox forums that deleting all of the extensions.* files from my Firefox profile folder allows Firefox to rebuild the files, and my extensions work again.
Upon reinstalling BD 2010, once again my extensions would not load when I opened Firefox, but at least I knew how to correct the problem. Is there any way to prevent BD 2010 from altering my Firefox files?
Tony