This has gotten some attention, especially about a week ago, but I really hope more people will continue to try it and, if interested, support it. It is Firefox, but heavily modified to please a different audience that prefers a slightly different UI than Firefox. It has some of the appeal of Arc, Vivaldi, and the Sidebery extension.
In my view, it is very promising, and all competition in this space is good. Here it is on Github, also.
I jump between a lot of profiles for work and chrome makes that too easy. It’s the only thing holding me back from switching to Firefox.
I find that multi account containers suits most of my needs for this. I have a container locked to work sites that has a separate credential chain.