miniaturized site

I believe the issue is that without an `initial-scale=1` in the viewport,
the site becomes unusable on HiDPi screens.

Page: https://www.w3.org/WAI/ER/tools/

The browser is Chromium Version 61.0.3163.91 (64-bit)

I have just realized the problem doesn't exist if I do not use experimental
platform features.

You might want to double check with Chromium, maybe it's a known issue.

Best Regards