Any caching options available for things dynamically loaded by WebPlayer?

I have an app running in WebPlayer. It uses WWW object to download dynamic content (textures, meshes). I would like this content to be cached locally if possible. I know I can't read/write files with the web player.

Is there any way to leverage the browser's cache? Like if I were to call out to the web page to get the file, it would bring it into the browser's cache.

Does Unity use the browser's cache? I understand it has its own cache, does that only apply to .unity3d files (and/or asset bundles)?