Exposing chrome JS objects to content without __exposedProps__ is insecure and deprecated. See https://developer.mozilla.org/en/XPConnect_wrappers for more information.
A exposición d'o conteniu d'os obchectos d'o chrome JS sense  __exposedProps__ ye inseguro y obsoleto. Se veiga https://developer.mozilla.org/en/XPConnect_wrappers ta tener-ne mas información.