Found out there is a limited number of items you can add. When it stops saving you need to export the list and delete the items to start a new list. I appears the limit is around 400 items. Despite that the add-on works as advertised.

Great Addons

I've been working on transferring my browser stuff over from Chrome. I've gotten pretty use to having reading list at this point so this add on is a must need if you're use to the Chrome features.

Edit: Just a heads up cause I guess I use this way too much but the amount of pages you can save to the reading list is around 369. Any more after that won't save(if you manage to it will disappear after going to another tab/page) I need to work on cleaning up what I put in the reading list.

Might be the Geeks developing Firefox, but this one just disappeared, despite being installed.

It's a very good extension help me keep my important in one place!

Ugly dark theme

very elegant and usfull addon

it is extrememly simple and that's why it's great

Useful, does exactly as I expect it to. The list syncs across devices, too.