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LESSON 5 · Protect Yourself Online

How Browsers Protect You

Modern browsers have built-in defenses that work quietly in the background:

  • Site isolation runs each site in its own process, so a malicious page cannot reach data in your other tabs
  • Certificate checks verify a site's security certificate is genuine, warning you when a connection may be intercepted
  • Sandboxing walls off website code, so even hostile JavaScript cannot touch your files or camera

This is why updates matter — each one strengthens these boundaries against newly discovered attacks.