[Note]: - A touchscreen is recognized by the test page even if it is disabled. [Affected versions]: - v64.0a1 [Affected platforms]: - Windows on Microsoft Surface Pro 2 i5 [Steps to reproduce]: 1. Enable the touchscreen of the touchscreen capable device, tutorial here: https://support.microsoft.com/en-us/help/4028019/windows-enable-and-disable-your-touchscreen-in-windows-10 2. Disconnect any other pointing devices. 3. Open browser and open test page: https://hiikezoe.github.io/interaction-media-features.html 4. Leave the test page in view and disable the touchscreen from the Device Manager. [Expected result]: - Test page content shows: pointer: none any-pointer: none hover: none any-hover: none [Actual result]: - Test page content shows: pointer: coarse any-pointer: coarse hover: none any-hover: none [Additional notes]: - This tablet is a Microsoft Surface Pro 2 i5: Name: DESKTOP-SE83IIG Serial number: 019373535253 SKU: Surface Pro 2 i5 Version Information Embedded controller: 24.1.50.0 System aggregator: 2.4.450.0 UEFI: 2.5.250.0 Wi-Fi driver: 14.69.24054.176 - In the Device Manager of the Surface Pro 2, the "Intel(R) Precise Touch Device" device does not appear, like in the case of the Surface Pro 4; - To disable the touch screen, I can only disable the "HID-compliant touch device" device, in which case, the "HID-compliant mouse" device would not disappear, unlike in the case of the newer Surface Pro 4.

Thanks for filing this. As discussed on Slack, I don't think this is a blocker for Firefox 64, setting P3 at this moment. I guess this is somewhat related to bug 1498286, we need a reliable way to tell there is no touchscreen.