This extension augments your in-scope proxy traffic by injecting non-invasive headers designed to reveal backend systems by causing pingbacks to Burp Collaborator.

To use it, simply install it and browse the target website. Findings will be presented in the 'Issues' tab.

For further information, please refer to the whitepaper at http://blog.portswigger.net/2017/07/cracking-lens-targeting-https-hidden.html