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Dark mode’s bright future: How dark mode will transform Wikipedia’s accessibility
(diff.wikimedia.org)
This is a most excellent place for technology news and articles.
Addons for darkening don't work on addons.mozilla, the irony!
All addons don't won't work on any Addon/extension page, across all browsers. I don't know why, but if I had to take an educated guess, it's so extensions can't make you download malware addons.
That said, on firefox, you can enable any extention to have thar privilege.