Modified Mozilla software may not keep Mozilla trademarks without prior written permission
Catalog row in Vendor License Rules · Cited
- Kind
- Restriction
- Statement
- Distribution Policy for Mozilla Software (undated; as published on 2026-09-27): changes to Firefox or other Mozilla software, including a changed default home page or bookmarks, added extensions or plugins, changed installer content or file locations, may not be redistributed under any Mozilla trademark without prior written consent and, typically, a distribution agreement. A modified Firefox may not continue to be called Firefox. The Trademark Guidelines require forks to choose their own name and branding.
- Applies when
- Redistributing a modified build (changed defaults, bundled extensions, altered installer) under a Mozilla name.
- Applies to
- Customised, repackaged or rebuilt Firefox and Thunderbird distributed to others.
- Related programs