Bug 631058 - Prefs for preload attribute defaults. [r=mfinkle, a=blocking-fennec]

mobile/app/mobile.js

@@ -567,3 +567,7 @@ pref("notification.feature.enabled", true);
 // prevent tooltips from showing up
 pref("browser.chrome.toolbar_tips", false);
 pref("indexedDB.feature.enabled", false);
+
+// prevent video elements from preloading too much data
+pref("media.preload.default", 1); // default to preload none
+pref("media.preload.auto", 2);    // preload metadata if preload=auto