Testing confirmed it works on ~arch systems, mixed-keyword systems may have
issues but this is no reason to limit the use of the flag.
# (see bug #556378 and others)
www-client/firefox system-cairo
mail-client/thunderbird system-cairo
-# system-libvpx on mozilla 45.1 and newer kept firefox
-# from playing html5 video in tests, mask for now until
-# further testing can determine why and fix
->=www-client/firefox-45.1.0 system-libvpx
# Johannes Huber <johu@gentoo.org> (21 Apr 2016)
# Unreleased dependency.