Problem I face a hue video problem only when I watch youtube movie on mozilla firefox ( for both firefox and aurora ). However, in other local player ( i.e. totem, vlc, etc. ) and google chrome are working fine. Solution Instead of using flash plugin alternative ( /etc/alternatives/mozilla-flashplugin//flashplugin-alternative.so ), I will use macromedia's flash plugin instead ( /usr/lib/flashplugin-installer/libflashplayer.so ) NOTE : firefox flash plugin path is /usr/lib/mozilla/plugins google-chrome-beta flash plugin is /opt/google/chrome/libgcflashplayer.so