How to know if one machine is in AWS from console? run:

sudo dmidecode --string system-uuid

If the result code start with EC2… this machine is in AWS

 

How to add plugin for change role in Chrome:

URL: https://chrome.google.com/webstore/detail/aws-extend-switch-roles/jpmkfafbacpgapdghgdpembnojdlgkdl/related