0306 => inactive, closes #615

whatever we thought it may have done in the past, it doesn't do that now as far as we know. And it's not an issue since we allow extension update-CHECKs anyway.

user.js

@@ -193,10 +193,10 @@ user_pref("app.update.staging.enabled", false);
 /* 0305: enforce update information is displayed
  * This is the update available, downloaded, error and success information ***/
 user_pref("app.update.silent", false);
-/* 0306: disable extension metadata updating
- * sends daily pings to Mozilla about extensions and recent startups
- * [NOTE] blocks any expanded text description, if it exists, when you "show more details about an addon" ***/
-user_pref("extensions.getAddons.cache.enabled", false);
+/* 0306: disable extension metadata
+ * used when installing, updating and checking for extension updates: if false, all it does is hide
+ * the expanded text description, if it exists, when you "show more details about an addon" ***/
+   // user_pref("extensions.getAddons.cache.enabled", false);
 /* 0307: disable auto updating of personas (themes) ***/
 user_pref("lightweightThemes.update.enabled", false);
 /* 0308: disable search update