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Mozilla adds mandatory Firefox extension data-disclosure controls for users and add-on listings

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1 unique sources, 1 articles

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Mozilla is adding a mandatory data-disclosure framework for Firefox extensions, giving users clearer visibility into what add-ons collect or share and blocking undeclared submissions. Starting November 3, 2025, new extensions must declare their data practices in manifest.json through a dedicated browser_specific_settings.gecko.data_collection_permissions key. The disclosure will appear at install time, on addons.mozilla.org, and in about:addons, making privacy practices visible before users approve an add-on. Mozilla plans a broader rollout for all extension developers in the first half of 2026.

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Timeline

  1. 24.10.2025 16:17 1 articles · 7mo ago

    Mozilla announces Firefox extension data-disclosure framework

    Initial Disclosure

    Mozilla announces a Firefox extension privacy-disclosure framework that requires developers to disclose whether add-ons collect or share user data with third parties, and says extensions that fail to declare their data practices will be blocked from submission to Mozilla's add-on repository.

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  2. 24.10.2025 16:17 1 articles · 7mo ago

    Firefox requires data disclosure for new extension submissions

    Legal Policy Action Update

    Mozilla begins requiring new Firefox extensions to declare their data practices in manifest.json using browser_specific_settings.gecko.data_collection_permissions, or explicitly state that no data is collected, so the disclosure can appear during installation, on addons.mozilla.org, and in about:addons.

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