support opn's options for loading a browser with arguments

Author: deanrather

lib/utils.js

@@ -165,13 +165,23 @@ var utils = {
             }
         }
     },
+
+    // https://browsersync.io/docs/options
+    //https://www.npmjs.com/package/opn
+    //
     /**
      * Wrapper for open module - for easier stubbin'
      * @param url
-     * @param name
+     * @param browser
      */
-    open: function (url, name) {
-        require("opn")(url, {app: name || null});
+    open: function (url, browser) {
+        var options = null;
+        if(_.isString(browser)) {
+            options = {app: browser};
+        } else if(Immutable.Map.isMap(browser)) {
+            options = {app: browser.toJS().app};
+        }
+        require("opn")(url, options);
     },
     /**
      * @param {Boolean} kill