What is the icon next to my address bar?

Platforms: Windows, Mac

The green or grey icon next to the address bar is Rapport. The icon is green when your communication with the website is secured by Rapport and is grey when the communication is not secured by Rapport.

‹ Sometimes Rapport warns me when I enter my password and sometimes it doesn't. Why?upWhen I click the Rapport icon- what does "Protect this Website" mean? ›
I