From 2a7312836cb869279b1361e07317536625e77318 Mon Sep 17 00:00:00 2001
From: Brendan Dahl <brendan.dahl@gmail.com>
Date: Thu, 4 Oct 2012 10:56:01 -0700
Subject: [PATCH] Add comment for migration.

---
 extensions/firefox/content/PdfJs.jsm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/extensions/firefox/content/PdfJs.jsm b/extensions/firefox/content/PdfJs.jsm
index 7cfbd2995..f36fa75a7 100644
--- a/extensions/firefox/content/PdfJs.jsm
+++ b/extensions/firefox/content/PdfJs.jsm
@@ -115,6 +115,7 @@ let PdfJs = {
     if (currentVersion >= VERSION) {
       return;
     }
+    // Make pdf.js the default pdf viewer on the first migration.
     if (currentVersion < 2) {
       this._becomeHandler();
     }