Supposedly people said Edge is Chromium based, and is better, less memory usage, etc. I tried it, it just feels more clunky, takes longer to open, pages take longer to load. I also dislike the interface, chrome's interface seems more natural to me. And of course doesn't have the same extensions.
Firefox feels faster than chrome for certain sites, but I find it has issues with other sites. Might be because sites design for Chrome these days. Also Firefox like the original Netscape has random freezes and bugs. A lot less, but I find chrome just works most of the time with less problems.
An example site I can think of, off the top of my head, youtube works way smoother in chrome than firefox. I'm not a huge youtube fan but lately I've been trying to view content that happens to be only available on youtube. Opera has even worse youtube support.
I can't remember why I stopped using Chromium but I think it was a lack of extension support. I recalled it lacked something Chrome had that was important to me. If it's important to you, I can use it again so I can remind myself what it was.
For the record I do use Firefox as my backup browser, and I would say it's better than Chrome at some things (it loads certain sites faster, and has better extension support), and better privacy options, but overall Chrome works better for every site.