I wonder if browsers could design a heuristic to cache multiple items in one cache entry -- that is, instead of the website doing file concatenation, the browse

I wonder if browsers could design a heuristic to cache multiple items in one cache entry -- that is, instead of the website doing file concatenation, the browser dynamically decides to concatenate some resources in order to reduce the number of asks to the local cache. For example, the browser would know on the initial load which requests get made together (such as three js files or four images), so they could get batched into a single cache entry