Abstract: Methods and systems for a service worker framework are provided herein. When a web application is accessed through a web browsing application, the web browsing application may invoke a service worker specifically created for the web application. The service worker may serve as an intermediary between the web application and the web browsing application and may intercept application data transmitted between the web browsing application and the web application. For example, the service worker may extract and encrypt any identification data included in the application data when it is received by a web browsing application. The service worker may store the encrypted identification data, for example, within the cache of the web browsing application and send modified application data to the web application (e.g., excluding the identification data).