diff --git a/src/scripts/renderer/components/keymap.js b/src/scripts/renderer/components/keymap.js
index 8a3fa6da..3d92d252 100755
--- a/src/scripts/renderer/components/keymap.js
+++ b/src/scripts/renderer/components/keymap.js
@@ -29,7 +29,10 @@ Mousetrap.bind('esc', function () {
   const enabled = prefs.get('close-with-esc');
   log('close with esc shortcut, enabled:', enabled);
   if (enabled) {
-    remote.getGlobal('application').mainWindowManager.window.close();
+    const mwm = remote.getGlobal('application').mainWindowManager;
+    if (mwm) {
+      mwm.window.close();
+    }
   }
   return enabled;
 });
diff --git a/src/scripts/renderer/preload/listeners.js b/src/scripts/renderer/preload/listeners.js
index 53cdc308..187ed085 100644
--- a/src/scripts/renderer/preload/listeners.js
+++ b/src/scripts/renderer/preload/listeners.js
@@ -7,6 +7,9 @@ remote.getCurrentWebContents().on('context-menu', function (event, params) {
   params.isWindows7 = platform.isWindows7;
   params = JSON.stringify(params);
   log('sending context menu', event, params);
-  remote.getGlobal('application').mainWindowManager.openContextMenu(params);
+  const mwm = remote.getGlobal('application').mainWindowManager;
+  if (mwm) {
+    mwm.openContextMenu(params);
+  }
   event.preventDefault();
 });
diff --git a/src/scripts/renderer/webview/listeners.js b/src/scripts/renderer/webview/listeners.js
index f95832ea..0c520c20 100755
--- a/src/scripts/renderer/webview/listeners.js
+++ b/src/scripts/renderer/webview/listeners.js
@@ -32,7 +32,10 @@ webView.addEventListener('page-title-updated', function () {
 
   // clear badge either instantly or after delay
   _delayedRemoveBadge = setTimeout(() => {
-    remote.getGlobal('application').mainWindowManager.notifCountChanged(count, badgeDataUrl);
+    const mwm = remote.getGlobal('application').mainWindowManager;
+    if (mwm && typeof mwm.notifCountChanged === 'function') {
+      mwm.notifCountChanged(count, badgeDataUrl);
+    }
   }, count ? 0 : 1500);
 });