Comment 40 for bug 1970884

When we upgrade our CI from 18.04 to 22.04 it would be great if we could take care of properly setting up the font cache to not trigger a generation for the very first start of Firefox. For all of our CI jobs it adds another 15s and also some test jobs fail under such a condition because the startup of Firefox takes longer than usual. I'll add bug 1670290 as dependency. Thanks.