If testing continues to progress well, we anticipate unveiling a fully open Firefox for Android extension ecosystem sometime in December. Stay tuned for details.

https://blog.mozilla.org/addons/2023/11/01/is-your-extension-ready-for-firefox-for-android/

I've had access to all the add-ons since a few months already using fennec and it's been like that for years. It's a not hard to setup but I have done it a long time ago so I don't remember exactly how. You need to make a Firefox account. Go to your account and create a list of the addons you want to use. Copy some Kind of ID ( I think account ID) and put it somewhere in fennec. Just follow a guide.