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YouTube MP4 extension

Security at a glance

Elevated riskSafety score 44/10022 findings

Automated estimate from our latest scan (malware, permissions, obfuscation) — not a security audit. Higher safety score is better.

See the full security report

Firefox listing ID: youtube-mp4-viewer

Permissions (9)

  • Access to all websites
  • View open tabs
  • Observe web requests

Related extensions

Frequently asked questions

Is YouTube MP4 safe to use?

Our latest automated scan rates the Firefox listing of YouTube MP4 at 44/100 (elevated risk) — malware, permission and obfuscation checks combined. The full report lists every finding behind the number.

What permissions does YouTube MP4 require?

YouTube MP4 requests 9 permissions. The most significant: Access to all websites, View open tabs, Observe web requests. See the full breakdown in the security report.

Who develops YouTube MP4?

YouTube MP4 is published by ytmp4. Impersonators copy popular extension names, so always verify the developer line and listing id on the store page before installing.