Have you uninstalled 'MacKeeper'

I did and I used EasyFind to get rid of any files let behind which might have been invisible. I think if I can clean my mozilla cache, that might help.

Try resetting your browser. You may want to reset your other browsers as well just in case. This sounds like a case of some sticky adware.

This article may help if you dont know how to reset Firefox.

https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings

Thanks. I will try the reset.

If this works please dont forget to mark my response as helpful and close the thread! Thank you! I'm glad i could help!

It worked.

Thanks again.

Bookmark and use this; Download the Mozilla Search Reset {web link} This add-on is very simple: on installation, it backs up and then resets your search preferences and home page to their default values, and then uninstalls itself. This affects the search bar, URL bar searches, and the home page.

Settings Guard for Firefox {web link} Detects and resets changes to settings that are frequently done by add-ons and application installers.

Thanks. The site that I first used to download Firefox was http://mozilla-firefox.en.softonic.com/mac. This is the site that implanted Mackeeper onto my hard drive and inserted the worm into my browser. People should be alerted not to use this site.

Littlebee

Please use these links;

You can report such a site at; Google Report Phishing Page {web link} which is the same when done while on site by going to Help > Report Web Forgery

Help us safeguard Mozilla’s trademarks by reporting misuse {web link}Help us safeguard Mozilla’s trademarks by reporting misuse {web link}

Problem solved