I use XMarks to Synchronize all my bookmarks, so I don't use Read it Later for that purpose.As a long term Firefox and Pocket user, I felt lost when Pocket replaced their Firefox addon with a 'save to pocket' button. Sync Between Computers - Sync your reading list with any number of computers, work or home.RSS Feeds - View your list from anywhere with automatic rss feeds of your items.Access Anywhere - Manage your list in any browser, on any device.Offline Reading Mode - Read the items you’ve saved for later on the plane, train, or anywhere.Save pages to a reading list to read when you have time.To read it I just click the link, to delete it I click the red check. When I have time to read it, or want to return the that shopping page, I click on my reading list. What I do is check the mark this add-on puts into the address bar when I want to refer back to a web page but don't need a permanent bookmark. I don't have them synchronize or even have an account.

How I Use ItI don't do any of the fancy stuff. When I read the Newsletter or article, or purchase the item I've researched, I click the red checks in the read it later list and they vanish. I use it for Newsletters or articles I don't have time to read. It then adds it to my 'read it later' list'. If I am research an upcoming purchase and I find a web page I may wish to return to, I simply click the Read it later check in the address bar.

Whenever I might want to refer back to a web page, but don't want to permanently save a bookmark, I use it. Update: Read it later became Pocket which got embedded into Firefox, so the extension is no longer available: Jan 2018

Pocket extension firefox