Hi, that policy instructs Firefox to "trust" SSL certificates stored by Windows instead of using exclusively its own list. That sometimes is injected by security software companies to make it more transparent that their software is scanning all of the pages you browse. But it also could be from a less trusted source. As a starting point, you could check the certificate for this site and see whether it identifies a man in the middle. Click the lock icon at the left end of the address bar, then click Connection Secure, then click More Information. The Page Info dialog will pop up showing the Security panel. Click the View Certificate button to open a new tab with certificate details. In the Issuer Name section, do you have this (what I believe to be the direct connection for West Coast users) or is there something else? '''Issuer Name''' Country US Organization Amazon Organizational Unit Server CA 1B Common Name Amazon