If you use Nightly or Beta you can use pretty much any addon with a few steps: https://www.ghacks.net/2022/10/20/firefox-beta-for-android-now-supports-custom-add-on-collections/

You need to create a collection and then you can use almost any extension (it's a pain in the ass to setup)

https://support.mozilla.org/en-US/kb/how-use-collections-addonsmozillaorg

Mozilla is so stupid sometimes... It makes it feel like they are trying to discontinue all extensions.