I can no longer fully debug in chrome. My extension shows up and I get the print calls from my extension but I can't run any code from the console. i can open the developer tools from the menu bar and then i can run code from the console, but this has no effect on my extension. i can't see any of the variable and more importantly, i can't reload the extension from the console.
debugging from safari (my preferred method) stopped working altogether long ago.
anyway, this puts a big damper on my development.
I was facing the same issue. Its been observed on latest chrome version 54.x onward.
As a workaround you can downgrade chrome. That's what I did.
Works for me on windows.