. Here, people are referring for
but if you can find out keys like contents, params then it can be easily done using Mechanize module only. Since in Mechanize::Firefox, you need Mozroepl installed in firefox and if suppose the site is not compatible with firefox then there will be an issue.
So, better that you should find out the keys using firebug and then use those keys in you code with Mechanize module to get the output. For better explanation, let me know the site URL and things you want to fetch it from there.