# mozilla/multi-account-containers

Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.

Repository: https://github.com/mozilla/multi-account-containers
Canonical: https://ross.abutalabs.com/products/multi-account-containers
Homepage: https://addons.mozilla.org/firefox/addon/multi-account-containers/
Language: JavaScript
License: MPL-2.0
License Family: copyleft
Topics: firefox, webextension
Last push: 2026-08-19T11:51:42+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 65, longevity 100
- inputs: {"age_days": 3562, "days_push": 14, "days_rel": 77, "gap_med": 144, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3124, forks 427 (observed 2026-08-28T04:07:44.432250+00:00)

## What it is
A Firefox browser extension by Mozilla that separates browsing into color-coded containers with isolated cookie storage, letting users run multiple accounts or identities simultaneously. It can also integrate with Mozilla VPN for per-container network privacy.

## Use cases
- sign in to two accounts on the same site at once
- separate work and personal email in one browser
- keep social network logins isolated from other browsing
- prevent cross-site tracking via cookie isolation
- use different identities in color-coded tabs
- route specific containers through Mozilla VPN

## When to choose
- you use Firefox and need multiple simultaneous logins on the same site
- you want to compartmentalize browsing to reduce tracking
- you want a Mozilla-maintained, widely used container solution

## When to avoid
- you use Chrome, Edge, or Safari instead of Firefox
- you need full browser-level isolation rather than per-tab cookie separation
- you need anonymous browsing beyond cookie isolation

## Facets
- artifact type: plugin
- maturity: active
- function: privacy, security, browser-extension
- domain: privacy, browser-extensions, web-development
- platform: browser, browser-extension
- tags: firefox-extension, cookie-isolation, containers, multi-account, webextension, tab-management

## Member repositories
- mozilla/multi-account-containers (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:44.432250+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:26:31.810085+00:00, confidence not recorded.
  - readme: https://github.com/mozilla/multi-account-containers (fetched 2026-08-28T04:07:44.432250+00:00, sha 0f3a48a2be64)
  - homepage: https://addons.mozilla.org/firefox/addon/multi-account-containers/ (fetched 2026-08-29T09:41:44.437753+00:00, sha f00f2664f6d6)
  - site_page: https://addons.mozilla.org/en-US/about (fetched 2026-08-29T09:41:44.440330+00:00, sha 3f375ef94bfd)
  - site_page: https://developer.mozilla.org/docs/Mozilla/Add-ons/Contact_us (fetched 2026-08-29T09:41:44.442033+00:00, sha bf57900e37d9)
  - site_page: https://www.mozilla.org/about/legal/amo-policies (fetched 2026-08-29T09:41:44.443597+00:00, sha d8620e504404)
  - site_page: https://www.mozilla.org/en-US/about/legal (fetched 2026-08-29T09:41:44.445113+00:00, sha 915f141ff13c)
- Data as of 2026-08-30T08:39:29.467469+00:00.