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Firefox is adding profiles to separate your browsing sessions
(www.theverge.com)
This is a most excellent place for technology news and articles.
It is a great feature and is the main reason I like Floorp (Firefox fork). But the UX does not look good, I think the way Floorp does is better:
https://docs.floorp.app/docs/features/how-to-use-workspaces/
That does not looks like the same feature at all.