Bug 373864 - Enable the HTML5 parser by default. r+sr=jst.

modules/libpref/src/init/all.js

@@ -2874,7 +2874,7 @@ pref("geo.enabled", true);
 pref("accelerometer.enabled", true);
 
 // Enable/Disable HTML5 parser
-pref("html5.enable", false);
+pref("html5.enable", true);
 // Toggle which thread the HTML5 parser uses for stream parsing
 pref("html5.offmainthread", true);
 // Time in milliseconds between the time a network buffer is seen and the