Mozilla will require Firefox extension developers to disclose data collection practices through the manifest.json file starting November 3, 2025, promoting transparency for users during installation and on extension pages. This new requirement aims to prevent unreported data sharing and ensure user awareness, impacting all new extension submissions on the platform. #Mozilla #FirefoxExtensions
Keypoints
- Mozilla mandates extension developers to declare data practices in their manifest.json file.
- Disclosures will be shown during installation and on the extension’s page in Firefox.
- Extensions must specify if they do not collect personal data to ensure transparency.
- Non-compliant extensions will be blocked from submission to Mozilla’s add-on repository.
- Existing extensions are not affected until they update to use the new framework.