It sounds that you may have deleted the Firefox profile folder, but forgot to delete the profiles.ini file as well.
So you need to delete the profiles.ini file as well.

• http://kb.mozillazine.org/Profile_folder_-_Firefox

• /Users/<user>/Library/Application Support/Firefox/

Hi cor-el. I tried to do what you suggested but it was very difficult to figure out. I eventually found the Library on my Mac but there is no folder relating to Mozilla or Firefox there. so I am back to square one. I have no access to Firefox at all so there is no use suggesting going onto firefox and searching or requesting anything that way. This is all very frustrating. Thanks anyway. J

Note that you need to access the Library folder in your user account (/Users) and not the Library folder in the root (/Library).

In Mac OS X v10.7 and later, the $HOME/Library folder is a hidden folder.

• http://kb.mozillazine.org/Show_hidden_files_and_folders

Open Finder and use one of these:

• Go > Go To Folder (Shift-Command-G) and in the dialog type: ~/Library
• Open the "Go" menu and hold down the Option key to make the Library appear

• http://kb2.adobe.com/cps/909/cpsid_90947.html Access hidden user library files

Try to use the Profile Manager to create a new profile as a test to check if your current profile is causing the problems.

See "Creating a profile":

• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues