Can't you click on the filename/number on the right hand side? That works for me in Chrome. Source maps even allow it to open to the correct file inside Chrome.
In Edge Dev Tools (so I'm sure it is similar in Chrome Dev Tools) it doesn't show source/line information in the log message directly (though it does have a link to the source line for the console.log message on the far right), but right-clicking a logged function includes a context menu choice for "Show function definition" which will jump to addStuff's declaration on line 1.