> that's the only conceivable useful difference over Containers

But thats a massive difference.

I have work profiles and a personal profile. I have password manager profiles for clients (clients will provide their own PM logins to segregate their access) which are different between them, and having separate profiles is huge.

Containers are great, especially for crappy websites that use your sessions for tracking which page you are on, but they are no where near powerful enough.

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degamad 9 hours ago | parent | next [-]

You've hit on the relevant distinction: user context vs system context.

I use containers to separate system context (partitioning cookies and site data) while remaining in the same user context (e.g. "personal browsing").

I use profiles for when I need different user contexts (different bookmarks and frequently used sites for different clients or projects).

When only one tool is available, you are limited by the constraints of that tool (e.g. bookmarks bleeding over between user contexts when using containers, or having to copy extensions or bookmarks into every profile).

	▲	kiernan 2 hours ago \| parent [-]
		I like to have it both ways. Given the options available so far I've preferred to have bookmarks shared between both and mainly keep tabs / working context separate. The best I've managed so far is to run separate instances of Firefox with the same Sync Account which appear as separate 'devices'. Nightly with a different icon and theme makes it obvious which is which. This way if I come across something interesting I want dig into further on my own time, I can bookmark it as well as 'Send Tab To Device -> Home' or 'Phone' depending on where I want to be and what environment I want to have available when I see it later (e.g. read only, or hands on). Yes, I may be hoarding a lot of tabs but that's a separate issue...

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sorcercode 8 days ago | parent | prev [-]

that's fair (and glad profiles have finally arrived in FF for that reason); personally, i don't use password managers linked to any specific browser but i can understand your use case.