Comment 52 for bug 1227034

Well, the default font configuration can't reasonably cover all cases. It's much easier to control which font is used when you use a related locale, and if you switch to Traditional Chinese as the display language, you'll find that they show up in the order you say is the preferred.

Actually, Chinese is a special case. As a result of this bug report, we added an extra config file to the fonts-droid package in order to give DroidSansFallbackFull.ttf precedence over other fonts that claim an ability to render Chinese, and with that make it easy to view Chinese contents also in case of a non-Chinese locale. But that kind of configuration, which affects all users, must not be too obtrusive.

You may want to file a new bug about the chrome issue.