RemoteAPI and NetworkProxy components registering
new QueryInterface syntax for faceplate and parsererror
fix mutex initialization
clean up extraneous code, fix someone's copy-paste error, and add an XXX note
these components and category registrations seem to be working so far
rewrite _isExtensionDisabled using AddonManager
cleanup
register MediaContentListener in external-uricontentlisteners category
correct js components/integration modules, register them in proper categories