Bugzilla can be enhanced using extensions (see :ref:`extensions`). If an extension comes with documentation in the appropriate format, and you build your own copy of the Bugzilla documentation using :file:`makedocs.pl`, then the documentation for your installed extensions will show up here.
Your Bugzilla installation has the following extensions available (as of the last time you compiled the documentation):
.. toctree:: :maxdepth: 1 :glob: ../extensions/*/index-admin