Browser isolation software is a cybersecurity technology that executes web browsing sessions in a remote, isolated environment, separate from the user's local device. This creates a protective barrier, preventing malicious code from websites, including malware, ransomware, and phishing attempts, from ever reaching or infecting the endpoint. Instead of the browser running directly on the user's computer, it runs on a remote server, a cloud instance, or even within a virtual machine. Only a safe rendering of the web content (such as a stream of pixels or sanitized web code) is then sent to the user's local browser for interaction.
This isolation can be achieved through various methods:
- Remote Browser Isolation (RBI): The most common approach, where the browser session runs completely in a cloud-based or on-premises server. Users interact with a visual stream of the browsing session.
- Client-side Browser Isolation: While less common for full isolation, some solutions use containerization or virtualization directly on the endpoint to isolate browser processes.
- Local Browser Isolation: This involves running the browser within a virtualized environment or sandbox on the user's own device. While it offers some protection, it doesn't provide the same level of detachment from the endpoint as RBI.
The primary goal of browser isolation is to eliminate the attack surface presented by web browsing, which remains one of the most significant vectors for cyberattacks. By isolating the browsing activity, organizations can significantly enhance their security posture, protect sensitive data, and ensure business continuity even when users visit untrusted or compromised websites.