1. A processing device adapted to render a web page, comprising: a user interface; a memory area, said memory area storing a manifest associated with a web page; and a processor programmed to: receive a request to render the web page available from a network source, the web page including plurality of elements, each of the plurality retrievable in response to a request for the element; retrieve a page manifest for the web page, the manifest specifying ones of the plurality of elements of the web page which will not be returned in response to the request for the element; block, in response to the manifest, at least one request for one of the plurality of elements in the web page; and render the web page with a subset of the plurality of elements on the user interface.