Extension has permission "Access your data for sites in the abc.de domain". [https://support.mozilla.org/en-US/kb/permission-request-messages-firefox-extensions The documentation] says that such extension can read "data you enter into those web pages, such as usernames and passwords" Can extension send such data away (for example to its developer)? What kind of permission is needed for that? Can you quote exact name of such permission/s from linked article so i can lookup that?