diff --git a/src/main/Main.coffee b/src/main/Main.coffee
index 17ce8ae8f..ba1aa0f90 100644
--- a/src/main/Main.coffee
+++ b/src/main/Main.coffee
@@ -1,8 +1,5 @@
 Main =
   init: ->
-    # XXX Work around Pale Moon / old Firefox + GM 1.15 bug where script runs in iframe with wrong window.location.
-    return if d.body and not $ 'title', d.head
-
     # XXX dwb userscripts extension reloads scripts run at document-start when replaceState/pushState is called.
     # XXX Firefox reinjects WebExtension content scripts when extension is updated / reloaded.
     try