Problem about Chrome Extension

I try to write an extension and i saw the very restricted policy security. I should create an extension that allows me 开发者_Go百科to listen and download podcast from web. It is possible? I use Chrome OS with VMWare, this OS has additional Api than Google Chrome Browser? Thanks

Yes it is possible to have a content scripts that executes on every page looking for specific media content. The content page could send a request back to the extension to indicate it has found a media file and using the URL you could play it in an tag inside the extension.