Caching a third party page in Full Page Cache can be accomplised by doing the following : 
 

  1. You need to find the page path of the page and then add it to the page rules.
  2. In Extendware -> Manage Extensions -> Page Cache -> Configure -> Developer enable the "Footer Widget"

 

  1. Enabling Footer Widget puts a black bar on your site. Go to the page and look at the black bar. It should say something like: page-path: module-controller-action

For example, if it said extendware-blog-view you would do the following:

  1. Go to Extendware -> Page Cache -> Configure -> Advanced and add <extendware-blog-view/> to the page rules list (of course use the correct page path for the page and not extendware-blog-view).