Correctly set initial visibilityState

lib/renderer/override.js

@@ -5,7 +5,6 @@ const remote = require('electron').remote
 
 // Helper function to resolve relative url.
 var a = window.top.document.createElement('a')
-
 var resolveURL = function (url) {
   a.href = url
   return a.href
@@ -160,8 +159,6 @@ window.alert = function (message, title) {
     title: title,
     buttons: buttons
   })
-
-// Alert should always return undefined.
 }
 
 // And the confirm().
@@ -227,8 +224,13 @@ Object.defineProperty(window.history, 'length', {
   }
 })
 
+// The initial visibilityState.
+let cachedVisibilityState = 'visible'
+if (process.visibilityState) {
+  cachedVisibilityState = process.visibilityState
+}
+
 // Subscribe to visibilityState changes.
-let cachedVisibilityState = 'hidden'
 ipcRenderer.on('ELECTRON_RENDERER_WINDOW_VISIBILITY_CHANGE', function (event, visibilityState) {
   if (cachedVisibilityState != visibilityState) {
     cachedVisibilityState = visibilityState