Hi to Mozilla support community, I have found an interesting Firefox add-on offering Anti-spoofing protection by checking website certificate at the first visit, and then later. Here is the page: https://addons.mozilla.org/en-US/firefox/addon/anti-certificate-spoofing/ Having tried to contact the support to ask some questions, it occurs the support email address is not valid (the domain doesn't exist). On the add-on store, there is only a report button for abuse, but it's not the case here. Can anyone help to get in touch with the support for this add-on or what to do in such situation? Many thanks, Alex