===Firefox 31+===
No add-on needed. You just need to set the preference ''dom.mozApps.use_reviewer_certs'' to ''true''.
TODO: also include om.mozApps.signed_apps_installable_from
====Android====
[[File:reviewer_cert_pref.png|right|320px|none]] Follow these steps to enable the preference to use the built-in reviewer certificates on Android: