1. An apparatus, comprising: a flow control mechanism configured for selectively pre-fetching page objects from a source server and for downloading page objects in an optimally parallel fashion from said source server to a browser via a resource-constrained communications link; a cache configured for caching said pre-fetched page objects and page objects that are downloaded by said flow control mechanism; a facility configured for invoking said flow control mechanism to pre-fetch, in an optimally parallel fashion, one or more page objects that are identified for fetching; and said facility configured for making said pre-fetched page objects available to said browser before they would be if they were fetched according to routine browser operation.