How to set breakpoints on each line of code?

console, google-chrome, google-chrome-extension, javascript

Solution

Open the Devtools Sources panel. Open the Content scripts tab, and browse to the extension script you want to debug.

Problem

I want to inspect how one of my chrome extensions works. I've opened its code in Chrome and would like to see which functions are called after extension starts. How can I set breakpoints on each line of code or debug the whole code?

Original source