Methods and apparatus, including computer program products, for processing a user interaction with an application, such as a browser-based application. A user interaction with the browser-based application is detected at a software framework. The browser-based application is executing in a browser at a local computer system. The user interaction is processed at the software framework, where processing includes determining whether the user interaction can be handled locally or requires access to a resource at a remote computer system. The user interaction is processed based on a result of the determination. A data item representative of the user interaction can be created at the software framework and stored at a data store. The data item can later be retrieved and the user interaction represented by the data item reprocessed at the software framework to replay the user interaction.