fix(browser): do not override ls debug if found

Author: levithomason

browser.js

@@ -140,15 +140,13 @@ function save(namespaces) {
 function load() {
   var r;
   try {
-    r = exports.storage.debug;
+    return exports.storage.debug;
   } catch(e) {}
 
   // If debug isn't set in LS, and we're in Electron, try to load $DEBUG
   if (typeof process !== 'undefined' && 'env' in process) {
-    r = process.env.DEBUG;
+    return process.env.DEBUG;
   }
-  
-  return r;
 }
 
 /**