Quora now forces users to log in to simply browse the site or read the discussions.
You can now hide the annoying X-less pop-up with the following bookmarklet:
<a href="javascript:(function(){$('.fb_signup_background').hide();$('.fb_signup_dialog').hide();$('.blurred_answer').css('text-shadow', 'none').css('color', 'inherit');$('.signup_cta_on_answer').hide();})();">Gimme Quora</a>
Just the JavaScript part:
javascript:(function(){$('.fb_signup_background').hide();$('.fb_signup_dialog').hide();$('.blurred_answer').css('text-shadow', 'none').css('color', 'inherit');$('.signup_cta_on_answer').hide();})();