         #if MOZ_CHANNEL_RELEASE
             return false
         #elseif MOZ_CHANNEL_BETA
-            return true
-        #elseif MOZ_CHANNEL_NIGHTLY
-            return true
+            return false
+        #elseif MOZ_CHANNEL_NIGHTLY
+            return false
         #elseif MOZ_CHANNEL_FENNEC
             return true
         #elseif MOZ_CHANNEL_AURORA

    }()

    /// Whether we just mirror (false) or actively merge and upload (true).
    public static let shouldMergeBookmarks = true

    /// Flag indiciating if we are running in Debug mode or not.
    public static let isDebug: Bool = {

        #if MOZ_CHANNEL_RELEASE
            return false
        #elseif MOZ_CHANNEL_BETA
            return false
        #elseif MOZ_CHANNEL_NIGHTLY
            return false
        #elseif MOZ_CHANNEL_FENNEC
            return true
        #elseif MOZ_CHANNEL_AURORA
