Tor Browser Security Guide 2026
Tor Browser is the standard gateway to the darknet. Proper configuration is essential for maintaining anonymity and protecting against attacks. This guide covers everything from installation to advanced security hardening.
Downloading Tor Browser
Always download Tor Browser from the official Tor Project website. Verify the PGP signature using the Tor Project signing key. The signing key fingerprint is: EF6E 286D DA85 EA2A 4BA7 DE68 4E2C 6E87 9329 7C85. Compare the downloaded file's signature against this key.
Installation and First Run
Install Tor Browser in a default location. On first run, Tor Browser will connect to the Tor network — this may take a few seconds. You can configure bridge settings if Tor is blocked in your country. Bridges are unlisted relays that help circumvent censorship.
Security Slider Settings
Click the shield icon next to the URL bar to adjust security levels:
- Standard: Default settings, all features enabled. Suitable for general browsing.
- Safer (Recommended): Disables JavaScript on non-HTTPS sites, blocks some fonts and math symbols. Recommended for most darknet activity.
- Safest: Disables JavaScript everywhere, blocks all fonts, images, and some media. Use for high-risk activities.
Fingerprinting Resistance
Tor Browser includes built-in fingerprinting protections: uniform window size, disabled WebGL, limited fonts, and consistent user agent. Do not install browser extensions — they can break Tor's privacy guarantees. Do not resize the browser window. Use the default security settings for maximum anonymity.
Safe Browsing Practices
- Never log into personal accounts (email, social media) while using Tor Browser
- Avoid downloading files — they may contain identifying metadata
- Disable JavaScript at Safer or Safest level
- Use separate Tor circuits for different activities (New Circuit for this Site)
- Clear cookies and site data between sessions
Advanced Configuration
For advanced users, about:config allows deeper customization. Consider disabling WebRTC (media.peerconnection.enabled = false), enabling first-party isolation (privacy.firstparty.isolate = true), and disabling IPv6 (network.dns.disableIPv6 = true). These settings provide additional privacy but may affect functionality.
For a broader security framework, visit our Security page. For step-by-step darknet access instructions, see the Access Guide. For market-specific security, read our Market Reviews.