I find current placement of the UI (in the Sources, next to the 'watch' pane) awkward. It would be much better to introduce a new panel in the main menu (especially when upload feature is introduced).
Save timeline to machine -> upload on dropbox or whatever service -> try to get the raw url -> drop in extension -> get back URL you need. Requires too much effort IMHO.
Ideas on how to make things easier are def. welcome. Doesn't block publicizing at all but nice to have an issue to throw ideas in.
I think the viewer may tackle all the things we wanted out of this extension and do some of them a bit better.
it includes CORS handling for github and dropbox. and then full auth & API for google drive. other auth'd services could be supported as well, presuming assets have real URLs.
To really complete the story we'll have to add a feature in Timeline like: right-click / Save Timeline To the Cloud and Copy Its URL