This is why I use Firefox. I honestly don't think that a browser engine monopoly is good for the world. Single point of failure for everyone with no alternatives is very bad if something nasty happens.

I think the creators of WINE said something similar about one of their reasons for creating WINE. Wish more browsers would use Gecko.

I actually use Edge as a daily, but I also use Firefox because I want to support them. Unfortunately, Edge and Chrome are superior to Firefox in performance. Edge especially is really really great at resource management, and it doesn't matter if I have 1 or 700 tabs and windows open. It'll manage it without any issues. Firefox however, won't. Sure, it's rich in features and it's very very flexible, but it's not as stable or fast as the former.

Still love Firefox, though!