for a likely solution see the How to fix preferences that won't save help article, especially the part about the user.js file in your profile folder!

Madperson: You were correct: the offending line of code was in the user.js file. After deleting it, the problem was solved. Many, many thanks!

I did that fix but it just keeps coming back after a while!!!

hello jf, it's likely that some sort of malware is still active on your pc. please run a full scan of your system with different tools...

Troubleshoot Firefox issues caused by malware

Do you know what the malware is? I have run 2 different scans and it still reverts back to the bank of america website.

hello, i'm not exactly sure what kind of malware it is - but according to this forum, running combofix did got rid of the infection: http://www.techspot.com/community/top.../#post-1179169

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 the 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