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Apple already shipped attestation on the web, and we barely noticed
(httptoolkit.com)
This is a most excellent place for technology news and articles.
I, too, have been using Firefox for decades and can think of no sites that have any problem other than very very old sites I used that were IE-only, built with Frontpage, and that was also early 2000-ish. I think most of the complaints about Firefox are nonsense and explainable as user based problems rather than tech.