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Leave big tech behind! How to replace Amazon, Google, X, Meta, Apple – and more
(www.theguardian.com)
This is a most excellent place for technology news and articles.
Floorp, a Firefox fork, containerizes also. Floorp does it in the same manner, meaning you create the containers and assign sites, and only after that does that site automatically get containerized. I do something similar to what you're doing, but it's between Firefox and Floorp. I wish they'd start containerizing sites by default, but for now this is what I do.