I looked for alternatives, around the time Firefox stable transitioned. I recall that ScrapbookX was going to try to transition. There was language about writing to browser local storage, but that appeared to me to be too constrained for my use, as well as not yet being in place.

Since then, I've taken more cursory looks but not found a suitable extension. I recently learned about Wallabag, but it did not appear to have the same amount of facility; nonetheless, I want to set it up and give it a go.

I've been a little distracted, this winter. So, I've not problem solved like I should.