Resumen
Browsers are at the heart of the Internet experience, and as such they are also at the heart of many of the security problems that plague users and developers alike. Early browsers had several major and noteworthy vulnerabilities, but they also had fewer types of attackers. Modern browsers must defend against increasingly well-organized criminals who are looking for ways to turn browser vulnerabilities into money. With more aggressive threats come more aggressive defenders. Security experts wanting to make names for themselves can release vulnerability information about browsers faster than browser developers may be prepared to react. Some browser developers are employing and refining their system for detecting, reporting, and responding to security flaws. Mozilla.org enlists open source developers to assist with code reviews and offers open bug tracking systems so that bugs can be reported and the follow-up tracked. Google has published an excellent Browser Security Handbook that compares various browser features and defenses.