# Firefox Multi-Account Containers privacy rating

Mozilla add-on for Firefox that separates sites into color-coded container tabs with isolated cookies and storage.

## Summary

Firefox Multi-Account Containers scores 80 out of 100 (grade B) on the browser extensions criteria. It meets 3 of 4 criteria: open source, no trackers or telemetry and no ads or data sales. It does not meet independent audit. It is based in the United States: Five Eyes member; subject to the US CLOUD Act.

- Website: https://support.mozilla.org/en-US/kb/containers
- Source code: https://github.com/mozilla/multi-account-containers
- License: MPL-2.0
- Jurisdiction: United States. Five Eyes member. Subject to the US CLOUD Act.
- Home page trackers: none found
- Category: [Browser extensions](https://privacyratings.com/browser-extensions/)
- Also rated: [Firefox Private Relay](https://privacyratings.com/email-forwarding/firefox-private-relay/) (Email forwarding and aliases), [Firefox Focus](https://privacyratings.com/browsers/firefox-focus/) (Browsers), [Firefox](https://privacyratings.com/browsers/firefox/) (Browsers), [Facebook Container](https://privacyratings.com/browser-extensions/facebook-container/) (Browser extensions), [Mozilla VPN](https://privacyratings.com/vpns/mozilla-vpn/) (VPN providers), [Firefox Translations](https://privacyratings.com/translation/firefox-translations/) (Translation)
- Grade: B (80/100)

## Criteria

| Criterion | Answer | Note | Evidence |
| --- | --- | --- | --- |
| Open source | Yes | MPL-2.0. | https://github.com/mozilla/multi-account-containers/blob/main/LICENSE |
| No trackers or telemetry | Yes | No telemetry or analytics in the extension source code. The support page loads no third-party trackers. | https://github.com/mozilla/multi-account-containers/tree/main/src |
| No ads or data sales | Yes | The add-on shows no ads, and Mozilla states it never sells user data. | https://www.mozilla.org/en-US/privacy/firefox/ |
| Independent audit | No | No independent audit is published. |  |

Source: https://privacyratings.com/browser-extensions/firefox-multi-account-containers/
Edit: https://github.com/privacyratings/privacyratings.com/edit/main/ratings/browser-extensions/firefox-multi-account-containers.md