There are two ways to implement updates in FF3: > * The updateURL uses https, or there is no updateURL at all (which defaults to addons.mozilla.org which is https) > * The updateURL uses http and the updateKey entry is specified which will be used to verify the data in the update manifest.from http://developer.mozilla.org/en/docs/Extension_Versioning,_Update_and_Compatibility#Securing_Updates To s