A system can provide a web browser application that generates a request for a data object to a server. The system can include a syncer delegate that intercepts the request from the web browser application and determines whether the requested data object is available in a cache memory. If the data object is available in the cache memory, the requested data object is transferred from the memory to the web browser application and the request is forwarded to a server over a network. If the data object is not available in the cache memory, the request is forwarded to a server over a network. The server can transfer the data object over the network to the syncer delegate, which can provide the data object to the web browser application and update the cache with the newly-received data object.