From 72d7af375fbf4ba7fd300ae4602e45a0c2652e59 Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Sat, 18 Nov 2017 12:28:59 +0000
Subject: Note reason for this rather obscure line.

---
 content_scripts/vimium_frontend.coffee | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'content_scripts')

diff --git a/content_scripts/vimium_frontend.coffee b/content_scripts/vimium_frontend.coffee
index feed4ae5..fa973e43 100644
--- a/content_scripts/vimium_frontend.coffee
+++ b/content_scripts/vimium_frontend.coffee
@@ -157,7 +157,7 @@ initializePreDomReady = ->
 # Wrapper to install event listeners.  Syntactic sugar.
 installListener = (element, event, callback) ->
   element.addEventListener(event, forTrusted(->
-    root.extend window, root unless extend?
+    root.extend window, root unless extend? # See #2800.
     if isEnabledForUrl then callback.apply(this, arguments) else true
   ), true)
 
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