--- a/dom/ipc/ContentChild.cpp
+++ b/dom/ipc/ContentChild.cpp
@@ -1276,34 +1276,42 @@ GetAppPaths(nsCString &aAppPath, nsCStri
     return false;
   }
   bool exists;
   rv = appDir->Exists(&exists);
   if (NS_FAILED(rv) || !exists) {
     return false;
   }
 
+  // appDir points to .app/Contents/Resources, for our purposes we want
+  // .app/Contents.
+  nsCOMPtr<nsIFile> appDirParent;
+  rv = appDir->GetParent(getter_AddRefs(appDirParent));
+  if (NS_FAILED(rv)) {
+    return false;
+  }
+
   bool isLink;
   app->IsSymlink(&isLink);
   if (isLink) {
     app->GetNativeTarget(aAppPath);
   } else {
     app->GetNativePath(aAppPath);
   }
   appBinary->IsSymlink(&isLink);
   if (isLink) {
     appBinary->GetNativeTarget(aAppBinaryPath);
   } else {
     appBinary->GetNativePath(aAppBinaryPath);
   }
-  appDir->IsSymlink(&isLink);
+  appDirParent->IsSymlink(&isLink);
   if (isLink) {
-    appDir->GetNativeTarget(aAppDir);
+    appDirParent->GetNativeTarget(aAppDir);
   } else {
-    appDir->GetNativePath(aAppDir);
+    appDirParent->GetNativePath(aAppDir);
   }
 
   return true;
 }
 
 // Returns whether or not the currently running build is a development build -
 // where development build means "the files in the .app are symlinks to the src
 // directory". This check is implemented by looking for omni.ja in