404 Explorer extension

Security at a glance

Some riskSafety score 79/1008 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: 404-explorer

Permissions (3)

  • Access to all websites
  • Observe web requests
  • Block and modify web requests

Frequently asked questions

Is 404 Explorer safe to use?

Our latest automated scan rates the Firefox listing of 404 Explorer at 79/100 (some risk) — malware, permission and obfuscation checks combined. The full report lists every finding behind the number.

What permissions does 404 Explorer require?

404 Explorer requests 3 permissions. The most significant: Access to all websites, Observe web requests, Block and modify web requests. See the full breakdown in the security report.

Who develops 404 Explorer?

404 Explorer is published by Hi Jon. Impersonators copy popular extension names, so always verify the developer line and listing id on the store page before installing.