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Firefox to become first mobile browser to support desktop extensions later this year
(blog.mozilla.org)
This is a most excellent place for technology news and articles.
That's nice, maybe they can finally re-enable about:config in the damn thing too. They removed it from mobile Firefox years ago and the lack of it aggravates the hell out of me.
It's available in nightly (and I think dev) builds
If you don't want to use the potentially unstable Nightly, Dev or Beta, you can use Fennec (stable builds with dev features).