I think this page explains it : <a href="http://osxdaily.com/2013/07/05/monitor-web-bandwidth-usage-easily-with-chrome/" rel="nofollow">http://osxdaily.com/2013/07/05/monitor-web-bandwidth-usage-easily-with-chrome/</a> Brief instructions from that page if this is what you meant Gauss. Using the Bandwidth Usage Monitor in Chrome This will instantly start keeping track of data that has been sent and received through the Chrome browser: Quit out of Chrome if it’s open already, then relaunch it to start a fresh browsing session (not technically necessary, but it makes this much easier) Press Command+L to jump to the location bar and enter the following exactly: chrome://net-internals/#bandwidth Bandwidth monitoring begins immediately, hit “Stop” to end bandwidth usage monitoring, or hit “Reset” to reset the data usage counter back to zero If you didn’t relaunch Chrome, or you just want to start over, hit the “Reset” button to push the counter back to zero. The data transfer is reported in kilobytes (kb), and if that’s not human readable enough for you, then just use a simple calculation to turn the number into megabytes (mb): Number in KB / 1024 = MB