This is Perl module WWW::Expand::More.
WWW::Expand::More installation is straightforward. If your CPAN shell is set up, you should just be able to do
% cpan WWW::Expand::More
Download it, unpack it, then build it as per the usual:
% perl Makefile.PL
% make && make test
Then install it:
% make install
WWW::Expand::More documentation is available as in POD. So you can do:
% perldoc WWW::Expand::More
WWW::Expand::More is hosted on github http://github.com/bayashi/WWW-Expand-More
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
Dai Okabayashi <bayashi@cpan.org>