First stab at refactoring webrtc mixin.
Getting closer. Still something f'd with local answerer.html.
Fix some minor bugs in webrtc stuff, inline API code.
Clean up some dead code.
Remove a number of stray edits and bs.
Ensure command_shell_options is present.
Make window invisible.
Fix transparent background, add VISIBLE option.
Add check for windows bug (RM#8810).
Move module to post/firefox/manage.
Land #3427 - Adds webcam module for firefox privileged sessions on OSX