Is 2! Authenticator Safe?

2! Authenticator — Nerq Trust Score 50.5/100 (C- grade). Based on analysis of 2 trust dimensions, it is has notable safety concerns. Last updated: 2026-08-02.

Use 2! Authenticator with some caution. 2! Authenticator is a Firefox extension with a Nerq Trust Score of 50.5/100 (C-), based on 3 independent data dimensions. Below the recommended threshold of 70. Security: 90/100. Popularity: 15/100. Data sourced from addons.mozilla.org metadata, permissions analysis, and source code availability. Last updated: 2026-03-22. Machine-readable data (JSON).

2! Authenticator Across Platforms

Same developer/company in other registries:

Safety Guide: 2! Authenticator

What is 2! Authenticator?

2! Authenticator is a Firefox add-on — The private, offline 2FA Authenticator. Import accounts from mobile apps and generate TOTP codes securely.

How to Verify Safety

Review permissions on addons.mozilla.org. Check if source code is available.

You can also check the trust score via API: GET /v1/preflight?target=2! Authenticator

Key Safety Concerns for Firefox add-on

When evaluating any Firefox add-on, watch for: excessive permissions, data harvesting.

Trust Assessment

2! Authenticator has a Nerq Trust Score of 50/100 (C-) and has not yet reached Nerq trust threshold (70+). This score is based on automated analysis of security, maintenance, community, and quality signals.

Key Takeaways

• 2! Authenticator has a Trust Score of 50/100 (C-).
• Review carefully before use — below trust threshold.
• Always verify independently using the Nerq API.

Disclaimer: Nerq trust scores are automated assessments based on publicly available signals. They are not endorsements or guarantees. Always conduct your own due diligence.