> etc.

No, pretty much just those. There are very few extensions available on new builds of mobile Firefox.

I got excited when the blog team announced that the were more available on the nightly buil, but after jumping through loads of hoops I found out there's just a couple of new ones and most extensions are still unavailable.

You most likely found some community suggested collection add-ons list. You can install any of the Firefox add-ons on mobile by adding them to your own curated collection.

The real question though is will all of them work?

No, I created my own empty list then tried to add extensions to it as described in the Firefox dev blog post.