November 1st, 2019 – The Firefox UX and Brand teams are currently working on consolidating a number of disparate design assets. This work will likely continue into early 2020.

Photon Icons Icons created as part of the Photon Design System. These are still usable in browser, app and marketing properties.

Photon Design System The design system developed in conjunction with the Firefox Quantum release. This system has useful content guidelines and UI guidelines for the Firefox Browser.

Protocol Component Library A CSS framework and usage guide maintained by the WWW team for use on mozilla.org. This framework is currently being adapted to be more widely applicable for web applications.

Firefox User Research An up-to-date reference for user research reports at Mozilla.

Firefox UX Blog Articles about research and design activities at Mozilla.

Firefox Design Values The values of the Firefox UX team that inform our design and decision-making processes.

Firefox Accounts Guidelines Prepare your design for integration with Firefox Accounts.