Unable to close responsive design mode
At least as recently as Developer Edition 77.0b5. Neither the keyboard shortcut nor the UI "x" button closes the mode. This is developer edition 77.0b5 on MacOS 10.14.6. For a handful of beta versions it seems inconsistent (sometimes worked sometimes didn't work) but now it seems like this happens every time. I'm not sure when I first noticed the issue.
由 Darby 於 修改