@Microplastics101 @Mercutio @librewolf - Microsoft Edge is a fork of Google Chrome/Chromium
Yes, it is that hard.
The modern web runs full blown applications within a sandboxed browser. It's massively complex. Front End (what the user sees) and backend (what does all the heavy computing on the server side).
There *are* efforts to build new browser engines separate from Firefox/Chrome but they are underfunded and understaffed. Its firefox (paid for massively by Google donations) and Google proper. That's it.