Bastion

About

Protect your browser from phishing, trackers, fingerprinting, data
  exfiltration, and token theft.

  Detailed description:
  Bastion is a comprehensive browser security extension that works silently in
  the background to keep you safe.

  🛡️  WHAT BASTION DOES:

  • Anti-Phishing — detects domains impersonating Google, Apple, Telegram, banks
   and 14+ major brands. Shows a full-screen warning before you enter any data.

  • Token Scanner — finds exposed JWT tokens, API keys, passwords and card
  numbers stored in your browser's localStorage, sessionStorage and cookies.

  • Tracker Blocker — blocks 300+ known tracking domains from Google, Facebook,
  TikTok, Amazon and others.

  • Security Headers Audit — grades every website (A–F) based on its HTTP
  security headers (CSP, HSTS, X-Frame-Options and more).

  • Anti-Fingerprinting — masks navigator properties to prevent sites from
  identifying your browser.

  • Anti-Exfiltration — monitors outgoing requests and alerts you when tokens
  are sent to third-party domains.

  • Anti-Miner — detects and blocks crypto mining scripts running in background
  workers.

  • Cookie Banner Hider — automatically hides GDPR/cookie consent banners on
  500+ sites.

  • Tab-Napping Protection — prevents malicious pages from hijacking browser
  tabs.

  • Keylogger Detection — alerts when a page registers an unusual number of
  keyboard listeners.

  🔒 PRIVACY FIRST:
  Bastion processes everything locally. No data is ever sent to our servers. No
  telemetry. No ads.

  💙 Free and open. If Bastion saved your data, consider supporting development
  via the Support tab.