diff --git a/lib/main.js b/lib/main.js
index 4548510..09e0aec 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -9,7 +9,7 @@ const attachmentDetailsURL = "https://bugzilla.mozilla.org/attachment.cgi?action
 //const attachmentDetailsURL = "https://landfill.bugzilla.org/bzapi_sandbox/attachment.cgi?action=edit&id=";
 
 pageMod.PageMod({
-  include: "https://github.com/*",
+  include: /https:\/\/github.com\/.*\/pull\/.*/,
   contentScriptWhen: "end",
   contentScriptFile: data.url("tweaks.js"),
   onAttach: function onAttach(worker, mod) {