Is there a chromium fork with containers?

I know Brave is working on it , but curious if there is stable open source fork (that’s maintained with fast updates) with containers (not profiles which all browsers have) , because the only reason I’m still using Librewof is containers

Brave’s Forgetful Browsing feature is significantly superior.

not useful with logging in same websites with different accounts at same time , and with different ips (very doable in firefox)

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