Is Metamask Legacy Web3 Safe?

Metamask Legacy Web3 — Nerq Trust Score 37.8/100 (F grade). Based on analysis of 2 trust dimensions, it is has significant safety risks. Last updated: 2026-04-01.

Exercise caution with Metamask Legacy Web3. Metamask Legacy Web3 is a Firefox add-on with a Nerq Trust Score of 37.8/100 (F), based on 3 independent data dimensions. It is below the recommended threshold of 70. Security: 65/100. Popularity: 45/100. Data sourced from addons.mozilla.org metadata, permissions analysis, and source code availability. Last updated: 2026-04-01. Machine-readable data (JSON).

Metamask Legacy Web3 Across Platforms

Same developer/company in other registries:

Safety Guide: Metamask Legacy Web3

What is Metamask Legacy Web3?

Metamask Legacy Web3 is a Firefox add-on — Adds MetaMask's legacy window.web3 API to your browser.

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=MetaMask Legacy Web3

Key Safety Concerns for Firefox add-ons

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

Trust Assessment

Metamask Legacy Web3 has a Nerq Trust Score of 38/100 (F) 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

• Metamask Legacy Web3 has a Trust Score of 38/100 (F).
• 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.