SAK-23349 : firefoxAlloew variable is set up to false until media.getVideoTracks() and media.getAudioTracks() will be implemented by firefox in order to use mute or disable video feature

git-svn-id: https://source.sakaiproject.org/svn/portal/branches/SAK-23349@132994 66ffb92e-73f9-0310-93c1-f5514f145a0a