I use Chrome with developer tools docked to the right hand side of the window. Chrome used to show the viewport dimensions at the top right of the window, when you resize the viewport by dragging the central divider. I've always found it useful for testing responsive sites and media queries.
Since a recent update, this has disappeared. Is there a way to switch it back on?
I'm using the latest version (Version 49.0.2623.87) on Mac.