This bug captures the UI flow for adding a Firefox list to the home screen. A Firefox is a list of content that comes from within the browser, like a bookmarks folder or synced tabs list, for example. Designs will be posted shortly.

I'm going to close out this bug, since this doesn't really fit into the flow that we ended up implenting. If we want to do something like this in the future, I think it would fit into the home panels settings UI, like we could have additional built-in panels that are disabled by default. It would actually be pretty nice to show synced tabs in a panel instead of in the tabs tray.