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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.
I mean.. it already does support desktop addons so I'm not exactly sure what's new here. It looks like this just fixes android killing background processes due to battery saving, but you can always just disable battery optimisation for firefox, or put it in "never sleeping apps", though granted even without doing this i've never experienced problems.
It supported them in the Nightly release. This is for the main release