We want to be able to add items to the Reading List via the sidebar UI. Undetermined as-yet whether this should only be the current tab, or it should prompt for a URL.

Micheal: Do we want to prompt for a URL here? If so, could you mock that up?

A URL prompt seems appropriate for the URL "Add to Reading List" button, but not the sidebar. Bit of a disconnect

Clarified this on IRC: Button will just add the current tab's URL. Same with the button in the URLBar. So that keeps v1 nice and simple. We'll look into the possibility of adding arbitrary URLs (not loaded in a tab) in v2+.

Sorting out strings... Michael, can you confirm? Button label: "Add to Reading List" Button tooltip: "Add this page to your Reading List" (The bookmarks star button's tooltip is "Bookmark this page")

Oh, I guess there's also some overlap here with bug 1131461 and https://projects.invisionapp.com/share/NK1ZBQ6SY#/screens/59725441 Although, given the sidebar isn't so obviously associated with the current tab, I'm not sure using the same exact wording is best.

+1

Not required for Reading List V1 Campaign Release.

Mass change of ReadingList bugs, moving to their own component. Filter bugspam on the following quote: “Reading is to the mind what exercise is to the body.” ― Joseph Addison

P2 based on this being a compromise for A11Y with the URL bar "add to RL" button, which has some A11Y issues.

ReadingList is no longer our priority.