Mozilla is implementing a big transparency requirement for Firefox extensions, mandating that every one new browser add-ons disclose their information assortment practices to customers earlier than set up.
Beginning November third, 2025, builders submitting contemporary extensions to the Firefox ecosystem should declare whether or not their software program collects or transmits private information by means of a brand new standardized framework embedded within the extension’s core configuration recordsdata.
The brand new information transparency initiative requires extension builders to specify information assortment permissions instantly inside the manifest.json file utilizing the browser_specific_settings.gecko.data_collection_permissions key.
This standardized method supplies Mozilla with constant metadata about extension conduct throughout its whole add-on ecosystem.
Extensions that don’t acquire or transmit any person information should explicitly declare this truth by setting the suitable “none required” information assortment permission within the property, guaranteeing that privacy-respecting instruments obtain correct recognition.
Information Assortment Insurance policies for Extensions
Builders ought to word that this requirement applies solely to new extensions submitted after November third.
Up to date variations of current extensions usually are not topic to the mandate throughout the preliminary rollout part, permitting the developer group time to combine the brand new framework into their current tasks.
Nevertheless, as soon as any extension begins using these data_collection_permissions keys in a brand new model, it should proceed implementing them for all subsequent releases.
Permission for information assortment with fallback
Extensions failing to adjust to necessities when vital shall be blocked from submission to addons.mozilla.org for signing, with clear explanatory messages guiding builders towards compliance.
The disclosed information assortment info shall be displayed prominently throughout a number of Mozilla platforms, offering customers with complete visibility into extension conduct.
When putting in an extension, customers will see the info assortment particulars displayed alongside conventional permission prompts, making a unified authorization expertise.
permission for extension with out information assortment
This info will even seem on the addons.mozilla.org extension itemizing web page and inside the Permissions and Information part of Firefox’s about:addons administration interface.
To take care of compatibility with older Firefox variations, builders supporting Firefox variations previous to 140 on Desktop or 142 on Android should present customers with different in-extension controls for managing information assortment and transmission instantly after set up.
This backward compatibility consideration ensures that the transition doesn’t alienate customers operating legacy Firefox variations.
Mozilla is adopting a gradual implementation technique, starting with new extensions in November 2025, whereas planning to increase the requirement to all current extensions within the first half of 2026.
The corporate has dedicated to offering substantial advance discover by means of the add-ons weblog earlier than mandating compliance for legacy extensions, giving builders satisfactory preparation time.
Moreover, Mozilla is growing new options to facilitate this transition for each extension builders and finish customers, although particulars stay forthcoming.
The initiative represents Mozilla’s broader dedication to browser transparency and person privateness, positioning Firefox as a pacesetter in requiring verifiable disclosure of knowledge practices earlier than customers grant extensions system entry.
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