In recent years, with the development of the Internet, it can be said that the browser is the biggest entrance to the Internet; the vast majority of users access the Internet using the browser. This has resulted in a tremendous rise in the browser market. In this highly competitive environment, more and more people have taken security of a browser seriously. On one hand, the browser is inherently a client; it will be quite safe if equipped with safety features like security software. On the other hand, security of browser has become a competing factor for browser vendors, who hope to establish technical barriers for security to gain a competitive advantage. Therefore, in recent years with constantly updated browser versions, browser security features are becoming more powerful.