Bug 1699329 - Add Hiragino fallbacks to font.name-list.monospace.ja, for cases where Osaka is not installed. r=emk

Differential Revision: https://phabricator.services.mozilla.com/D108936

modules/libpref/init/all.js

@@ -3104,7 +3104,7 @@ pref("font.size.monospace.x-math", 13);
 
   pref("font.name-list.serif.ja", "Hiragino Mincho ProN, Hiragino Mincho Pro");
   pref("font.name-list.sans-serif.ja", "Hiragino Kaku Gothic ProN, Hiragino Kaku Gothic Pro, Hiragino Sans");
-  pref("font.name-list.monospace.ja", "Osaka-Mono");
+  pref("font.name-list.monospace.ja", "Osaka-Mono, Hiragino Kaku Gothic ProN, Hiragino Sans");
 
   pref("font.name-list.serif.ko", "AppleMyungjo");
   pref("font.name-list.sans-serif.ko", "Apple SD Gothic Neo, AppleGothic");