1. A system comprising: a network computing component comprising one or more server computing devices, the network computing component comprising an instantiated browser application in communication, over a network connection, with a browser application of a client computing device, wherein the network computing component is operable to: receive, from the client computing device, a request for a network resource hosted by a content provider, wherein the network resource comprises a first embedded resource and a second embedded resource; identify processing of the first and second embedded resources, wherein the first embedded resource is determined to be processed in the browser application of the client computing device, and wherein the second embedded resource is determined to be processed, at least in part, in the instantiated browser application; process, in the instantiated browser application, at least a part of the second embedded resource to obtain a browser processing result of the second embedded resource; obtain prioritization rules for transmitting the first embedded resource and the browser processing result of the second embedded resource to the browser application of the client computing device, wherein the prioritization rules specify priorities at which the first embedded resource and the browser processing result should be transmitted to the client computing device; and transmit, over the network connection, the first embedded resource and the browser processing result of the second embedded resource to the browser application of the client computing device according to the prioritization rules.