Browser protections are the security features built into modern web browsers to make saved data harder to steal. They include encrypted password stores, cookie and session isolation, sandboxing, permission prompts, anti-phishing checks, and operating-system-backed secret storage. Their goal is to reduce the damage if a browser profile, cache, or local file is accessed by an attacker.
These controls matter because browsers often hold high-value targets such as passwords, autofill data, cookies, and session tokens. Stealers and other malware try to bypass browser protections by reading profile files, extracting tokens from memory, abusing local access, or hijacking an already authenticated browser session. Good defenses combine browser hardening with device security, user logon protection, and strong monitoring for suspicious access to browser data. In practice, browser protections slow attackers down, but they do not replace endpoint security or multi-factor authentication when a machine is already compromised.