$pkg is a wrapper around an instance of Mozilla's $iface interface. This class inherits from L\<$parentclass|$pkgbase\::$parentclass>.
$classcomment
Pass this to QueryInterface.
To install Mozilla::DOM, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Mozilla::DOM
CPAN shell
perl -MCPAN -e shell install Mozilla::DOM
For more information on module installation, please visit the detailed CPAN module installation guide.