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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.
That's unnecessarily dismissive. Unfortunately, even the best extensions have their downsides. Some used a browser that suited their preferences better instead, which is a shame for both Firefox and the user, in my opinion.
Mozilla recognizes this and is finally taking action to integrate highly requested features into Firefox. Many "who really care" are glad for this, because it is a good thing.