The browsers in the OP support ICC version 4 because they use Google's
Blink display engine. (They pass the color test in Post #3.)
The display of ICC version 4 is correct in Internet Explorer 11.
This source says that ICC v4 is supported in Edge and Safari (see table):
https://www.color-management-guide.c...anagement.html
Here's how to enable ICC version 4 in Firefox:
https://www.metalvortex.com/blog/2012/07/12/979.html
However, these other browsers need to be checked with the tests in
the OP. (IE11 scores miserably, only 302 on the first test.)
- sutekh