My Google Chrome shortcut Ctrl+Shift+M is not working

My Google Chrome shortcut Ctrl + Shift + M is not working

https://developers.google.com/web/tools/chrome-devtools/shortcuts

It works in Firefox but not in Chrome, any idea?

When I use the shortcut, my user profile shows up as a pop up.

Solution 1:

Yes, it's working but the shortcut is being caught by the normal window browser instead of the Chrome Developer Tools window.

For the Ctrl+Shift+M shortcut to really open/toggle the Device toolbar/mode (instead of opening the user profile popup), you need to be focused on the Chrome Developer Tools window. This is a PITA in my opinion.

Explanation

This happens because this same shortcut is used to open this user profile selection popup (as described under Google Chrome feature shortcuts):

Log in a different user or browse as a Guest: Ctrl + Shift + m

Lastly, it seems that there is still no way to disable Chrome shortcuts, but only override them by assigning them to extensions. You can read more about this on this article.