Firefox Relay is a subscription-based service designed to protect your real email address while engaging in online activities. This tool allows users to generate unique aliases for signing up for various accounts, applications, or newsletters, effectively safeguarding their primary email from potential breaches. If unwanted emails start to flood in, users have the option to block the alias, stopping further correspondence without affecting their main inbox. The service is particularly useful for maintaining privacy and reducing spam, making online interactions safer and more manageable.

For those seeking additional features, the Firefox Relay Premium version offers unlimited alias creation and the ability to send replies from these aliases. Users can also create custom domains for their aliases, enhancing memorability and ease of sharing. The add-on requires access to all websites to function effectively, along with storage capabilities for personalized settings and context menus for user-friendly navigation. Overall, Firefox Relay is a valuable tool for anyone looking to enhance their online privacy.