I want to trace the network activity that happens when I click on a link. The problem is that the link opens a new tab, and apparently the Dev Tools works per tab it was ope
The feature request mentioned in the comment by phsource has been implemented.
In recent versions (starting with Chrome 50), you can go to the Developer Tools Settings menu (open Developer Tools, then use the 3-dots menu or hit F1) and check the box that says "Auto-open DevTools for popups".