When you download the installer for these browsers and try to install them, the Edge prompt will pop up, suggesting that "Edge is the faster, safer browser designed for Windows". Now it has been seen to be testing a significantly more obtrusive messaging method to try and swat away and stall the installation of rival browsers.
Microsoft Edge is not doing so well despite the fact that it is the default web browser on Windows 10.
The existence of such a pop-up alert will be controversial with some PC users. Microsoft has also added an option "Don't want to be warned in the future" which takes the users to Settings and allows them to disable app recommendations.
This change is part of Windows 10's October 2018 update, which was looking pretty good until now. That kind of passive-aggressive styling has become all too common in pop-ups that want you to sign up for newsletters, download specific apps or do whatever else the person who set up the pop-up wants you to do. A user who initiates the installation of a browser does so on goal.
For years now, Microsoft has been fighting what really feels like a losing battle against Google and Mozilla, two big players in the internet browser space. It's clear Microsoft doesn't know, because it's resorted to using annoying pop-up warnings when users try to install another browser. We have a serious bone to pick with Windows 10's development team here: This message sounds like it's about safety, but it's just about Microsoft's profits.
Prompts of that sort can be turned off by using the link under the buttons on the popup. It shows a smiling person standing in front of the Edge logo, leading what is presumably their best life now that they've broken free of Chrome and Firefox.
I tried to install Chrome Stable and Firefox Stable, and both installations were intercepted by the prompt.
The message that pops up calls itself a "warning", but the only reason it's warning you to use Edge is that Microsoft would prefer you do so.