I’d like to extend Chrome/Chromium functionality at the browser level with more power than is available in Chrome extensions.

Ideally, it would be great if I could write a plugin in Rust, compiled to a dynamic C library that hooks into/extends Chromium functionality.

Does such a capability exist?

I realize there are probably security concerns with this; which is probably why Chromium doesn’t seem to have this capability – but it would be helpful for me as I could develop tools to aid in my local development experience.