Also from the official announcement (https://blog.mozilla.org/addons/2023/11/28/open-extensions-on-firefox-for-android-debut-december-14-but-you-can-get-a-sneak-peek-today/ ):
Starting December 14, 2023, extensions marked as Android compatible on addons.mozilla.org (AMO) will be openly available to Firefox for Android users.
“We’ve been so impressed with developer enthusiasm and preparation,” said Giorgio Natili, Firefox Director of Engineering. “Just a few weeks ago it looked like we might have a couple hundred Android extensions for launch, but now we can safely say AMO will have 400+ new Firefox for Android extensions available on December 14. We couldn’t be more thankful to our developer community for embracing this exciting moment.”
I installed it and gave it a whirl. I’m not sure if I’m just doing something wrong, but every time I disable it for a specific website (like with discord or lemmy, since those already have dark themes), I get a popup that says, “Settings application failed. Refresh the page and try again. Midnight Lizard has been updated. Please refresh the page.” It also seems to make the extension popup switch to light theme, which is pretty atrocious lol.