more info here: https://blog.mozilla.org/addons/2023/11/01/is-your-extension-ready-for-firefox-for-android/
earlier, we could use extensions(except for 7-8 highly poplar ones) with an account containing add-ons collection(in nightly versions). But now it's coming to beta and stable as well.
image transcription:
collage of Mr bean waiting in the field with the text "Me waiting for more extensions in Firefox for Android."
below is another Mr bean image, this time excited, sitting in a plane with the text that reads "they are arriving in version 120."
I've been using Ruffle (https://ruffle.rs/) to play Flash games on mobile for a while. Nice to see I finally won't have to jump through hoops to put Firefox Nightly into developer mode and force it to install an extension not in the pre-approved list. Maybe it'll even work on websites this time like it does on desktop and I won't have to copy Flash URLs into the extension page!