this post was submitted on 23 Sep 2024
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Why Did Mozilla Remove XUL Add-ons? (yoric.github.io)
submitted 2 months ago by kirk781@discuss.tchncs.de to c/firefox@lemmy.ml
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An old article but provides a detailed view on the choice of removing the old XUL addons

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[–] Dirk@lemmy.ml 29 points 2 months ago

XUL was HORRIBLE to write, implement, and debug. Been there, done that. It was also 0% portable.

WebExtensions (even if there are some technical limitations and some browser manufacturers decided to intentionally cripple some of the APIs) are in general so much better. You have proper toolchains for development, translations, testing, and publishing. And it is pretty much portable to all browsers. You don't even have to port anything 99% of the time because it's just compatible.