It seems like something regressed to always set the display color profile (this isn't even necessary for Mac port since it supports per-window color profils :( ). Even worse, nrwt doesn't unset the color profile before launching Safari so I can't even differentiate red/green on pretty diff.
This was an intentional change due to bugs: https://bugs.webkit.org/show_bug.cgi?id=80571 Resetting before launching Safari is covered here: https://bugs.webkit.org/show_bug.cgi?id=80567 and sort of https://bugs.webkit.org/show_bug.cgi?id=81845
(In reply to comment #1) > This was an intentional change due to bugs: https://bugs.webkit.org/show_bug.cgi?id=80571 > > Resetting before launching Safari is covered here: https://bugs.webkit.org/show_bug.cgi?id=80567 and sort of https://bugs.webkit.org/show_bug.cgi?id=81845 Someone could feel free to review either or both of those last two bugs (hint, hint) ...
*** This bug has been marked as a duplicate of bug 81845 ***