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Themes allow you to change the look and feel of the user interface and personalize it to your tastes. Learn how to create and share themes!

Browser Themes

Browser theme concepts
Get an introduction to creating themes for the latest versions of Firefox
Using the AMO theme generator
Use the theme generator to create and submit a new theme to AMO

Lightweight Themes

Lightweight themes have been deprecated and are no longer accepted by AMO. Only browser themes will be accepted going forward.