NewsPublished 27 Oct 2025

New Firefox Extensions Required to Disclose Data Collection Practices

Source SecurityWeek

Description

All new extensions will be required to declare their data collection practices in their manifest file using a specific key. The post New Firefox Extensions Required to Disclose Data Collection Practices appeared first on SecurityWeek .

Impact

For European organizations, the primary impact is on privacy compliance and operational processes related to browser extension management. Organizations must ensure that any Firefox extensions they deploy, especially custom or third-party ones, comply with the new manifest disclosure requirements to avoid installation issues or policy violations. This transparency can help organizations better assess privacy risks associated with extensions and reduce inadvertent data leakage. It also supports compliance with GDPR and other stringent European data protection laws by promoting informed consent and data minimization. However, since this is not a vulnerability or exploit, it does not directly threaten system security or availability. The update may require updates to internal policies, extension vetting procedures, and user awareness training. Failure to comply could result in extensions being rejected from the Firefox Add-ons store or blocked by organizational policies, potentially impacting productivity if critical extensions are affected.

Defensive guidance

1. Review all Firefox extensions currently in use within the organization to verify compliance with the new manifest data collection disclosure requirements. 2. For internally developed extensions, update manifest files to include the required data collection declarations before deployment. 3. Establish or update extension vetting procedures to include verification of manifest disclosures for new extensions. 4. Educate IT staff and end users about the new policy to ensure awareness of data collection practices and encourage cautious extension installation. 5. Monitor Mozilla’s official communications and Firefox Add-ons store policies for any further updates or enforcement timelines. 6. Integrate extension compliance checks into existing privacy and security audits to maintain alignment with GDPR and other regulations. 7. Consider deploying browser management tools that can enforce extension policies and block non-compliant extensions automatically. 8. Collaborate with extension vendors to ensure transparency and compliance with the new requirements.

References

securityweek.com/new-firefox-extensions-required-to-disclose-data-collection-practices/ (opens in a new tab)

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Description

AI analysisMachine-generated, updated 27 Oct 2025, 11:22 UTC

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