I was just on yahoo .com
"scareware." Designed to generate alerts and scare you to the point where you will contact and pay for the removal of infections that do not exist.
There was an active java script on that page.

Hardening your web browser means to install extensions that will help it protect itself (and your system on the same occasion) against Exploit Kits, MiTM attacks, etc. but also you at the same time. Here are a few extensions that I recommend you to install.
  • uBlock Origin: Efficient multi-purpose blocker that is lightweight on RAM and CPU usage (Google Chrome, Mozilla Firefox, Microsoft Edge, Opera and most Chromium and Firefox-based browsers)
    Read over the link below
    https://www.bleepingcomputer.com/for...ing-analytics/

  • NoScript: NoScript is a script blocker (Java, Flash, JavaScript, etc.) for Mozilla Firefox and Firefox-based browsers (Mozilla Firefox and Firefox-based web browsers)

https://noscript.net/