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.