diff --git a/platform/chromium/manifest.json b/platform/chromium/manifest.json
index 9fa9a35e8..451e2764f 100644
--- a/platform/chromium/manifest.json
+++ b/platform/chromium/manifest.json
@@ -2,7 +2,7 @@
     "manifest_version": 2,
 
     "name": "uBlock Origin",
-    "version": "1.11.5.105",
+    "version": "1.11.5.106",
 
     "default_locale": "en",
     "description": "__MSG_extShortDesc__",
diff --git a/platform/firefox/bootstrap.js b/platform/firefox/bootstrap.js
index 41107bbcc..7e2dddc9b 100644
--- a/platform/firefox/bootstrap.js
+++ b/platform/firefox/bootstrap.js
@@ -60,10 +60,7 @@ function startup(data/*, reason*/) {
         return;
     }
 
-    let appShell = Cc['@mozilla.org/appshell/appShellService;1']
-        .getService(Ci.nsIAppShellService);
-
-    waitForHiddenWindow(appShell);
+    waitForHiddenWindow();
 }
 
 function createBgProcess(parentDocument) {
@@ -109,7 +106,10 @@ function getWindowlessBrowserFrame(appShell) {
 }
 
 
-function waitForHiddenWindow(appShell) {
+function waitForHiddenWindow() {
+    let appShell = Cc['@mozilla.org/appshell/appShellService;1']
+        .getService(Ci.nsIAppShellService);
+
     let isReady = function() {
         var hiddenDoc;