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4 browsers that will continue to support uBlock Origin and other ad blockers with Manifest V2
(www.xda-developers.com)
This is a most excellent place for technology news and articles.
I've done tests with the built-in Firefox strict mode vs uBlock and there's a bit of a difference. Firefox blocks about two thirds, uBlock is almost 100%.
I think they were talking about the built-in ad blocker that certain other (not firefox or chrome) browsers have, instead of UBlock.
Firefox doesn't have a proper adblocker. It's just a tracker blocker.