The preferences for the tab environments have an inconsistent keyboard and screen reader exposure problem. First problem: The different items are in a list, but arrow keys don't actually work to navigate among the list items. Expected: Arrows up and down navigate to the different items such as Shopping etc. Tab would move to the Preferences and Delete buttons for that item. Actual: Arrow keys don't do anything, tab moves through all preferences and delete buttons. Second problem: The items don't actually link to the buttons. A screen reader user only hears Preferences and Delete all the time while tabbing through that dialog, but not which button belongs to which item. The items themselves are mere labels that happen to be adjacent to the buttons, but other than visually, have no relationship to the buttons. This dialog should work much like the list of add-ons in Add-On manager, where there are also buttons for each item, and one can select the individual add-ons via up and down arrows. Turning these into actual list items would also give better markup and a clear relationship between the items and their buttons.

They are already in a <richlistbox> as actual <richlistitem>s. I don't know off-hand why keyboard navigation / a11y is broken.

Reminding myself to look at this.

Bulk change per https://bugzilla.mozilla.org/show_bug.cgi?id=1401020

I'm going to clear the NI, it's not currently on my plate. I'm happy to work through this with anyone etc if they want to take it. This looks like it's changed a little since the first STR in that arrows appear to act like tab.

Pushed by gijskruitbosch@gmail.com: https://hg.mozilla.org/integration/autoland/rev/61377e7604a6 implement generic richlistbox improvements for keyboard focus, r=Jamie,settings-reviewers,mossop