I know that currently the bookmark api for extensions is not available on Android and I hope this will change in the near future. But for the time being, I wonder if it is possible to write an app for android, what can read and write to Firefox Bookmarks. Is that possible? I have never written apps for Android as of now, but if this is possible, I would try my luck and create such an app. In this case I think about a helper or companion app, what can read current bookmarks from Firefox Android and write new bookmarks to the same structure.
Maybe someone can point me please to more information?