Protect your online privacy by editing permissions.
MyPermissions Cleaner for Firefox allows you to review and edit the permission you have set for applications linked to online accounts. It automatically scans your apps permissions and clean your apps permissions in one click. You can stay connected with the alerts when apps gain access to your private info.
Firefox suggests not to visit their site due to the following message. " mypermissions.com uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided." Not a good feeling when the browser blocks you from the site - hmmmmm....
Summary
until Firefox is comfortable with the site don't use it.