Suppose, I enter a URL in my browser and browser submits the HTTP request. The remote HTTP server accepts the request and initiates a long task to serve the request.

If I terminate the request before it is complete (for example, press Esc or in Firefox), how is the request closed? Will the browser communicate this abort request to the server (I think it doesn't)?

Presuming no, upon completion of the long task, what will the server do with the result? Does it send it back anyway? If it does, what will happen? Does it reach till my PC? Or gets lost on the way?

This is just for my curiosity.

Thanks for your time :)