Pop-Up Ads Masquerading as Yahoo Pages

For the past two weeks, about a third of the links I click on from Facebook very quickly get crowded out by fake Yahoo search pages featuring weird-ass phrases I certainly never searched for, and links to presumably spam-oriented sites.

When did this become a thing? I have a MacBook Pro and use current Firefox.

Download and run Malwarebytes free AV scanner. (Or some other antivirus program)
Watch out for things trying to misdirect you to anywhere else.

Also, check your browser - IE - Tools - Internet OPtions - COnnections - LAN settings.
I’ve seen viruses that redirect you toa “proxy” which is just running all the internet requests through the virus’s mother ship. You may have to go to safe mode (boot while pressing F8* over and over) and set “autodetect proxy settings”

Will do, thanks!