There's also:
* proprietary Adobe code for implementing DRM ("EME")
* Hello, which has proprietary dependencies on the back-end - similiar issue
to UbuntuOne
I wrote about these in more detail here:
http://www.coactivate.org/projects/disintermedia/blog/2015/09/07/mozilla-sells-out-firefox-users-for-market-share/
Mozilla has been flailing since it lost funding from Google, and is currently
suffering from terrible leadership from a software freedom and community
stewardship POV. As well as these terrible decisions on allowing proprietary
bits and DRM, it has been canning projects left and right (apparently
Thunderbird is next on the chopping block). If things don't improve at the
Mozilla Foundation, it may be necessary for the developer community to walk
away and create a new stewardship body, like the Document Foundation folks
did when they walked from OpenOffice.
