Tks for all you have done, appreciated.

If it does not work in the next few days, what then?

What malware scanners did you try?

Did you try AdwCleaner?

• AdwCleaner:
  http://www.bleepingcomputer.com/download/adwcleaner/
  http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml

Create a new profile as a test to check if your current profile is causing the problem.

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

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

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

Tried heaps of malware antivirus software, all say clean.

Tried new profile and this is what I now have, where is the browser? Or how do I get to it. You must remember I know nothing about computers

The last snap you posted is the built in Firefox about:home page.

Have you tried to send an e-mail to Facebook?