Browser based attacks are one of the most common vectors used by adversaries to gain control of an internal system on a target network. In this "beachhead assault" stage of a cyber attack campaign, attackers attempt to exploit known and unknown (zero-day) vulnerabilities in browser applications. The main goal in secure browsing is to prevent malware from successfully breaching the browser and establishing persistence on the underlying endpoint.
Article Link: Browser Isolation - The Next Generation of Secure Browsing