MaskMail — Private Temp Inbox by RatioWorks

MaskMail is a privacy-focused temporary email extension designed to make disposable inboxes simple and understandable. Create a temporary email address in seconds, copy it with one tap, receive and read messages, monitor unread mail, and replace an address when it is no longer needed.
MaskMail includes a responsive privacy dashboard with mailbox activity, locally generated statistics, service diagnostics, configurable refresh intervals, optional new-message notifications, accessibility controls, and clear explanations of what each privacy feature does.
The interface automatically adapts to desktop, tablet, and mobile layouts. MaskMail also provides adjustable text sizes, reduced-motion support, touch-friendly controls, and an interface designed for both new and experienced users.
Temporary mailbox functionality is provided through the Mail.tm service. MaskMail does not collect or transmit personal usage analytics to the extension developer. Extension preferences and locally calculated statistics remain in Firefox extension storage.
Key features include temporary email addresses, disposable inbox management, unread-message notifications, remote-resource protection when displaying messages, mailbox search, privacy statistics, diagnostics, responsive mobile/tablet support, and accessibility options.
MaskMail is based in part on the open-source Raccoon project and has been substantially redesigned and expanded with a new interface, privacy dashboard, responsive layouts, diagnostics, accessibility features, and additional mailbox-management functionality.