GNU/Linux Desktop Survival Guide
by Graham Williams
To check which plugins are installed for your browser, visit the url about:plugins.
For Java plugins see Section 44.3.
For a viewer of various video formats install mozilla-mplayer and mplayer-686. The mozplugger package provides a variety of other plugins.
For a Macromedia Flash Player plugin, install the nonfree package flashplugin-nonfree.