I understand where you are coming from with this but let's consider the security implications of embedding just anything in the browser.
A prime example is embedding custom fonts with CSS. The code that handles them wasn't built with arbitrary fonts downloaded from untrusted sources in mind (I think the guy that wrote the code said that's insecure and a bad idea).
A prime example is embedding custom fonts with CSS. The code that handles them wasn't built with arbitrary fonts downloaded from untrusted sources in mind (I think the guy that wrote the code said that's insecure and a bad idea).