Aspects described herein are directed toward systems, methods, devices, and non-transitory computer-readable media for containerizing a web application and managing its execution. In example implementations, at least a portion of a web application a resource list identified by that web application is retrieved. The portion of the web application and the resources retrieved are cached at a computing device. The application manager intercepts one or more function calls invoked at the cached portion of the web application and processes the function calls intercepted.