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Zen Browser - A very nice, Firefox-based, clean UI browser
(zen-browser.app)
This is a most excellent place for technology news and articles.
The profile switching is just that of Firefox, but with a button that makes it a bit more accessible. And there is the concept of workspaces within a given profile, but I haven't quite figured out how to set it up best for my workflow yet.
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.