These are small software programs that customize the browsing experience on mobile devices using a specific operating system. They add functionality to the mobile browser, enabling features like ad blocking, password management, or enhanced productivity tools directly within the application. A user might, for example, install a program that automatically translates foreign language web pages within the browsing app.
The addition of these programs to a mobile browser is significant because it enhances user control and offers personalized web experiences. Historically, mobile browsing functionality has been limited compared to desktop environments. The ability to integrate external tools into the mobile browsing experience expands possibilities for optimization, security, and accessibility, making the browser more adaptable to individual needs.