The functionality of chrome://net-internals/ was reduced in Chrome 71.

It retains the same buttons for performing actions like flushing the socket pools, and the #hsts page is unchanged. But pretty much everything else is gone.

* Cannot load netlog files
* Cannot display network events, timeline, or polled data

This was an intentional change described in  Issue 678391 .

This changes existing workflows.

### Post mortem debugging ####

To load a netlog file, you now use the netlog_iewer webapp instead of chrome://net-internals.

Details on using this, or checking out its source are here:

https://chromium.googlesource.com/catapult/+/master/netlog_viewer/

### Live inspection of network state ###

You can no longer do that.

The supported model is to capture and then import (similar to chrome://tracing).

Some workarounds to approximate the live view are:

 (1) Start and then stop a chrome://net-export/ dump, and then open it in the netlog_viewer.

 (2) Start an unbounded capture with chrome://net-export/ (clear the size restriction) so it saves to a single file. Then repeatedly re-load this file into the netlog_viewer app to see new events.

It is understood that this is more limiting that before. Issue 892453 tracks adding back support for live inspection, under the split viewer architecture.