# 2FAS Auth - Two factor authentication

> 2FAS Auth Browser Extension is simple, private, and secured: one click, one tap, and your 2FA token is automatically entered!

Canonical page: [https://chrome-stats.com/d/2fas-two-factor-authentication](https://chrome-stats.com/d/2fas-two-factor-authentication)

## Overview

- **ID:** `2fas-two-factor-authentication`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** 2FAS
- **Category:** privacy-security
- **Daily users:** 8,503
- **Weekly downloads:** 249
- **Rating:** 3.80 / 5 (98 ratings)
- **Version:** 1.8.4
- **Last updated:** 2026-08-17
- **First published:** 2022-06-22
- **Size:** 5.28 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/2fas-two-factor-authentication/)
- **Website:** [https://2fas.com/](https://2fas.com/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/2fas-two-factor-authentication/privacy/](https://addons.mozilla.org/firefox/addon/2fas-two-factor-authentication/privacy/)

## Description

2FAS Auth Browser Extension offers a simple and secure way to handle two-factor authentication (2FA) codes. With just one click or tap, your 2FA token is automatically entered, eliminating manual input errors and saving time. The extension pairs seamlessly with the 2FAS Auth app on your phone, allowing instant verification for logging into any 2FA-enabled online service.

Set up is quick and easy: install the extension on your desktop browser, pair with your mobile app, and start enjoying faster, safer logins. 2FAS Auth supports Time-based (TOTP) and Event-based (HOTP) one-time passwords, enhancing security by generating codes offline that refresh every 30 seconds or per login. No account registration is required, ensuring privacy throughout your authentication process.

## Rankings

- #852 — Overall
- #189 — Privacy & Security
- #2 — mention
- #17 — fact
- #44 — location
- #45 — password-protected

## Permissions and access

### Permissions

- `activeTab`
- `tabs`
- `storage`
- `unlimitedStorage`
- `notifications`
- `contextMenus`
- `webNavigation`
- `alarms`

### Host permissions

- `*://*.2fas.com/*`

### Content script matches

- `*`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users praise 2FAS for its security-first approach (TOTPs stay on the phone with push approvals) and a polished, feature-rich experience, plus data export/migration and Android syncing. The main trade-off is convenience: you must approve via your mobile device for each code, which some find pointless or cumbersome compared to desktop-only workflows. Overall, it’s valued for security and portability with some workflow friction.

### Pros

- Security-focused design that keeps TOTPs on your phone and uses push approvals to deliver codes in-browser
- Data portability via export/migration so you can switch accounts without re-adding them
- Well-designed, feature-rich, and secure overall experience
- Good integration with Android/mobile and syncing across devices
- Open-source (foss) project nature appeals to users who prefer libre software

### Cons

- Requires mobile approval for every 2FA code; not a standalone desktop solution, reducing convenience
- Some users feel the workflow is pointless because they still have to use their phone to approve each time
- Reliance on the mobile app for core functionality can lead to occasional reliability issues or bugs reported by some users

## Similar extensions and apps

- [2FAS Pass Browser Extension](https://chrome-stats.com/d/2fas-pass-browser-extension) — 622 users, 4.90 / 5
- [Authenticator App](https://chrome-stats.com/d/authenticator-app) — 1,285 users, 2.80 / 5
- [MFAuth - 2FA Authenticator](https://chrome-stats.com/d/mfauth) — 18 users
- [2! Authenticator](https://chrome-stats.com/d/2-authenticator) — 16 users
- [Authenticator App](https://chrome-stats.com/d/authenticator-2fa-secure) — 357 users, 3.00 / 5
- [2FAuth](https://chrome-stats.com/d/2fauth-addon) — 80 users, 3.75 / 5
- [AT&T MFA for Firefox](https://chrome-stats.com/d/att-mfa) — 1 users
- [2FAFast Authenticator](https://chrome-stats.com/d/2fafast-authenticator) — 9 users
- [2FAuth (beta)](https://chrome-stats.com/d/2fauth-beta)
- [Akamai MFA for Firefox](https://chrome-stats.com/d/akamai-pushzero-authenticator) — 69 users, 3.33 / 5
- [2FA Authenticator](https://chrome-stats.com/d/2fa_fire) — 36 users
- [SAASPASS Password Manager & Authenticator 2FA SSO](https://chrome-stats.com/d/password-manager-authenticator) — 223 users, 4.19 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/2fas-two-factor-authentication)