Windows – Browser recognising non-touch screen as a touchscreen

I have recently replaced the primary screen in my triple-monitor arrangement with a touchscreen. Set-up worked like a dream on connecting without the need to change any settings.

However, I notice that since adding the touchscreen to the setup, my Chrome browser displays websites optimised for touch (mostly the differences are minor like items in drop-down menus are now much more spaced out) regardless of which monitor the browser is open on.

I rarely open my browser on the touchscreen. Is there a way to set it so that Chrome knows which monitor is open on, so that it knows when it is not running on the touchscreen? Failing that, is there a way to manually turn off the touch-optimisation of websites in the browser?