All Amazon roots are cross-signed by other trusted roots, so they were already trusted by all systems, including Microsoft: <a href="https:&#x2F;&#x2F;www.amazontrust.com&#x2F;repository&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.amazontrust.com&#x2F;repository&#x2F;</a><p>They are also on their way to be added natively to the Firefox root store: <a href="https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1172401" rel="nofollow">https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1172401</a>