Stop trying to make it happen...

A new chapter in the browser wars.

When you try to install the Firefox or Chrome web browser on a recent Windows 10 version 1809 Insider build, you may notice that the installation gets interrupted by the operating system.
-- https://www.ghacks.net/2018/09/12/microsoft-intercepting-firefox-chrome-installation-on-windows-10/

Yes, Microsoft, I am sure you are pretty proud of your Edge browser, but this is not the behaviour I'd want from an OS.