Rated 5 out of 5 stars

Perfect. Having used it since 2005, I never actually needed all of RefControl's granularity tho I did have to whitelist many sites (paypal, banks, amazon, etc.). I had to abandon it when it went broken in Firefox 5 (fully documented and emailed to Mr. Abbatiello. Twice.). CRB is an elegant solution. I keep it at zero 99.9% of the time and when I have to refer I hit that nice big icon as needed. THANKS cK-LFC!! Goodbye RefControl.

This review is for a previous version of the add-on (0.43.1-signed).