A browser developer designs and creates web browsers, the software used to access the internet. They work on the browser's user interface, implementing features that enhance user experience such as bookmarks, history or tabbed browsing. They also ensure the browser's compatibility with various web standards and protocols. Crucially, they focus on security aspects to protect users from threats like malware and phishing. They often work on performance optimization, striving to increase speed and efficiency. Debugging and problem-solving are also central to their role. They may further collaborate with other developers to integrate additional functionalities, such as extensions or plugins.