Other ways to say { -brand-name-firefox-relay } collects the websites where you’ve used your email masks, and labels your masks with those websites so you can easily identify them. you can opt out of this on your settings page, under privacy. but please note, turning that setting off means you won’t be able to see where you’ve used each mask, and your account names will no longer sync between devices. you can learn more about the data { -brand-name-firefox-relay } collects in our privacy notice.