2FAS - Two factor authentication

2FAS extension is simple, private, and secured: one click, one tap, and your 2FA token is automatically entered!

2FAS - Simple and Secure Two-Factor Authentication Firefox Add-on

The '2FAS - Two factor authentication' is a Firefox add-on that facilitates easy and secure login to online services with two-factor authentication. This extension allows automatic entry of tokens with just one click, effectively eliminating the need for manual re-typing. It pairs with the 2FAS app on your phone, generating time-based or HMAC-based one-time codes for your account, greatly enhancing the security of your personal data.
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Add-on stats

By: 2FAS
Users: 6,826
54
Rating: 3.95
(76)
Version: 1.7.3 (Last updated: 2024-10-21)
Creation date: 2022-06-22
Weekly download count: 266
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood:
Moderate risk likelihood
Manifest version: 2
Permissions:
  • activeTab
  • tabs
  • storage
  • notifications
  • contextMenus
  • webNavigation
  • https://*.2fas.com/*
  • wss://*.2fas.com/*
Size: 5.52M

Ranking

# 971 ▲ 7
Other rankings
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Other platforms

2FAS - Two Factor Authentication (v1.7.3)
3.55 (94) 40,000
Not available on Android
2FAS - Two Factor Authentication (v1.7.3)
4.80 (14) 9,237
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Add-on summary

Analyze keywords

Add 2FAS to your web browser with our extension! Enter tokens automatically without re-typing for better security!

The 2FAS extension allows you to log in to any online service with 2FA enabled, faster!

Easy set up in three steps:

  1. Install the extension on your desktop browser
  2. Open the 2FAS app on your phone and pair your phone with your desktop browser
  3. Start using the 2FAS extension

When you want to log in using a 2FA token, simply select 2FA token input field, click the 2FAS extension icon, and confirm login on your phone!

Secure and fast log in.

Simply pair the service you want to login to with your 2FAS app, then 2FAS will automatically select your token for future logins, no searching or typing required!

See more

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Open source project allowing data export
  • Increases security by keeping 2FA tokens off the PC
  • Great integration with a mobile application for token approval
  • Works as intended when respecting the principles of MFA
  • Detailed support and recommendations available (e.g., video tutorial)
Cons
  • Requires a mobile application for functionality
  • Performance issues causing Firefox to lag
  • Dependence on the phone for authentication, which can be inconvenient
  • Users feel it complicates the copy/paste process for OTP codes
  • Not designed to manage tokens independently on the desktop
Most mentioned
  • Requires mobile app for use
  • Performance issues with Firefox
  • Functionality heavily dependent on phone approval for tokens
User reviews
Great app lock
by Firefox user 18512170, 2025-01-17
by Trinxery, 2024-12-28
After Authy announcing the end of their desktop app I was looking for an alternative and found 2FAS, an open source project (foss), it was my final choice because it has the option to export your data and therefore allowing you to migrate somewhere else easily if needed, thing that Authy didn't have... now if I want to change I'll just export it somewhere else, no more setting up all accounts again.
by Alesk, 2024-12-27
View all user reviews

Add-on safety

Risk impact

2FAS - Two factor authentication requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

2FAS - Two factor authentication is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Upgrade to see risk analysis details