Will browsers prompt (like mic and video) for permission before opening p2p traffic? I'm afraid random sites could behind my back make my machine (via nat trave

Will browsers prompt (like mic and video) for permission before opening p2p traffic? I'm afraid random sites could behind my back make my machine (via nat traversal if needed) participate in illegal torrenting. It's the legal world we live in, and while I welcome the new browser abstractions, this must be behind a permission popup and provide a way to permanently disable without building a custom browser. What's the status on that?