Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control>(Mac:<Command>)<Shift> A)

In the Add-ons Manager, on the left, select Extensions. Remove yahoo Anything. Now do the same in the computers Programs Folder.

Windows: Start > Control Panel > Uninstall Programs. Mac: Open the "Applications" folder. Linux: Check your user manual.

http://www.clamxav.com/ free malware scanner for Mac OS X https://discussions.apple.com/docs/DOC-3291

You can also try https://www.malwarebytes.org/antimalware/mac/index.html

Thanks for the reply FredMcD. Followed your instructions. There are no Yahoo extensions on my Mac. Also, I scan regularly with Clam xav. Ran full scan today with no malware found. I am wondering whether it is Mozilla/Yahoo thing to badger users until they load the extension or if it is a link to a blackhole exploit site. In any case I will not click on the link. If I can't resolve this I will have to switch to a different browser.

• 1 Download Firefox For All languages And Systemsv41 {web link}
• 2 Uninstall Firefox from your computer {web link}
  DO NOT remove your profiles.
• 3 After, reboot the computer. Then run the full installer.

OK, I'm good. Thanks much.

Glad to help. Safe surfing.