A browser emulator is provided. An example browser emulator system includes a communications module to receive requests for web pages from a browser application, a document object model (DOM) interceptor to intercept an initial document object model (DOM) provided by the web application, an activator to activate a browser emulator, and a DOM manipulator to generate a modified DOM. A marked-up document that corresponds to the modified DOM includes an event interceptor that replaces JavaScript code associated with the original DOM provided by the web application.