Firefox Add-ons

Mozilla Firefox browser extensions

Firefox Add-ons (addons.mozilla.org) is the smallest of the big browser stores we cover, with around 36,000 extensions, and it reviews submissions more slowly than Chrome — which historically bought it some safety but also delays clean updates. Mozilla's permission prompts are explicit, which makes the manifest a useful source of truth for analysis: we score every add-on on requested permissions, bundled libraries, network indicators, and update history, the same way we treat Chrome extensions.

• –Wide host permissions paired with content scripts that read every page
• –Bundled trackers and analytics SDKs in add-ons marketed as privacy tools
• –Long-abandoned add-ons that get adopted and repurposed by new publishers

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