Well, after overcoming my own ignorance, I must say that this is the perfect replacement for Firefox's live bookmarks. Furthermore, the support is outstanding. Just remember, Livemarks creates a bookmark folder for any given rss feed. Just drag that folder to your bookmark toolbar and, voila, live bookmarks lives again. This add-on allowed me to update my Firefox 60 to Firefox 78 and retain the functionality that I wanted. Can't say enough.

簡單好用。
Very useful.

(English below)
Presque parfait, fonctionne à peu près comme l'ancien lecteur de flux de Firefox. Seul reproche : les icônes ne sont pas personnalisables.

Almost perfect, works roughly as the previously existing Firefox RSS reader. Little nitpick: I would like to be able to have the website icon as the folder image (but does Firefox allows that?) and have the icons change instead of an added checkmark (which is not as visible as the yellow RSS icon turning gray)

This is just what I was looking for - thank you! :)

This extension was great, but after the update to Firefox 79.0 (windows 64 bit) it no more works :-(

----------------------
(update: SOLVED :-) it was the use of CCleaner that cancels some sqlite archives in Firefox. Thanks to the developers of this extension)

At last a MUST HAVE for feeds ! Would it be also possible to add an option to mark ALL feeds as READ without opeing ithem. Thank you for this absolute great work.

very helpful addon save lot of time

Livemarks eklentisi harika, Eskisi gibi Rss beslemelerini almak çok güzel...

good to go

5 stars for this webextension ! love it and so glad to retrieve my feeds. keep up the good work.