diff --git a/master_preferences b/master_preferences
index 0169655..bbe072c 100644
--- a/master_preferences
+++ b/master_preferences
@@ -23,7 +23,7 @@
      "show_on_all_tabs": true
   },
   "first_run_tabs": [
-     "http://file:///usr/share/doc/HTML/index.html",
+     "file:///usr/share/doc/HTML/index.html",
   ],
   "homepage": "file:///usr/share/doc/HTML/index.html",
   "homepage_is_newtabpage": false