https://www.bleepingcomputer.com/news/microsoft/microsoft-edge-to-let-you-block-potentially-unwanted-programs/

Microsoft Edge is testing a new feature in their Canary build that allows you to block potentially unwanted programs (PUPs) from being downloaded by the browser.

Potentially unwanted programs, or PUAs as Microsoft calls them, are software that straddle the line between legitimate applications and malware. They tend to display unwanted ads, perform redirects, hijack functions of your browser or computer, use scare tactics, or claim to fix system issues, but don't really do anything.