I bought an old i5 desktop today and decided to play with the new Chromium-based Edge before removing the HDD and sticking Ubuntu on a new one. They've dressed it up pretty nicely and have well-integrated a (as-yet not quite feature complete) Microsoft sync service. It looks like with the flip of a switch you can allow Edge to use Chrome extensions (the option, if I recall the wording correctly, was to use extensions "from other stores"). It also appears as though they have some anti-malware stuff baked in there as Google does. That pretty much competes a clean sweep of most major browsers using Chromium as a base; leaving Firefox to stand alone.