Implement the downloads API for Android. This is the ability to interact with bookmarks. The API is: https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/downloads This has been implemented for Desktop, so we'll need to implement the Android equivalent. For reference, the main downloads bug for Desktop was bug 1213445.

Note: in theory downloads is working on Android, but we've found that in the past there might be issues like the tests running (maybe some are disabled) and any other restrictions that Android imposes. This bug might be small in that it might be just a matter of double checking all the APIs work and if they do, closing.