I used a version previously only found on github, but which apparently a couple of days ago was updated on the official anki extension page:

https://ankiweb.net/shared/info/2880922486

It's still not perfect, and I would love if all the bugs were worked out, but I've been using it for a few months and the benefit of being able to remember everything important that I read more than outweighs the cost of dealing with occasional bug.