Most of the time, when I click on a field with an email prompt for login, the Firefox Relay plugin covers the entire page, and cannot interact with the page. I either must choose an alias with it, or have to remove the focus of the email field. I mean I know using my actual email address can be a security concern, but it cannot be so much of a concern, that I may not allow it to use it?! And I rarely use it anyway. Can't recommend this plugin like this.