Starting a month ago, I occasionally get the following pop-up in Edge:

Download Microsoft Edge mobile app
Take your AI-powered copilot for the web on the go!

This is not a pop-up coming from a web site, but a built-in pop up from the browser itself.

So how can this and similar pop-ups from Microsoft be permanently disabled in Edge? Here you go:

• In the browser bar, type edge://flags. This will present a list with browser experimental options.
• Type Show feature and workflow recommendations in the search area of the experimental options page
• Set the Show feature and workflow recommendations setting to Disabled
• Click on the Restart button that appears on the right bottom

That's it. From now on, you should not see those annoying pop-ups.