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Mozilla is adding tab grouping, vertical tabs, profile management, and local AI features to Firefox
(connect.mozilla.org)
This is a most excellent place for technology news and articles.
This is avoidable with the right CSS.
I'm sure you're right lol I just don't know it and its more work than it needs to be.
That it is. Firefox updates have broken my CSS several times now, so I am quite happy for them to add side tab officially.