Hello.
I am the main developper of the Auto-Sort Bookmarks add-on for Firefox (Github repository).
I do not use Firefox anymore, so I do not plan to update my add-ons anymore.
Since this add-on is used by many people (currently 18 000 users), I am looking for someone to continue the development of this add-on.
If someone is interested to do the development, please contact me (here or on Github).
Thanks.