I can't take any headphone with a battery seriously because it's on borrowed time the moment it's manufactured.
Why spend more than £50 on a headphone with a battery that won't hold charge in 2 years? It's not like they make the battery easy to change.
So a web tunnel enabled web server not only serves its own pages, but also acts as a proxy to other sites and all the traffic looks like web browsing to the regular web server?