A secure browser is a web browser designed to protect users' privacy and security while they browse the internet. It includes features like blocking malicious websites, preventing tracking by advertisers, and encrypting data to keep personal information safe. Popular secure browsers often have built-in tools to enhance user safety, such as pop-up blockers and phishing protection. Many secure browsers are based on open-source projects, allowing developers to inspect and improve their code. Examples of secure browsers include Mozilla Firefox, Brave, and Tor Browser. These browsers aim to provide a safer online experience by prioritizing user security and privacy.