From 570cf0456ce912aa4e331b103c5b1b4a3b5e7dc2 Mon Sep 17 00:00:00 2001
From: hackademix
Date: Fri, 20 Jul 2018 23:30:14 +0200
Subject: Prevent multiple canScript content messages during the same page
 load.

---
 src/content/content.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/content')

diff --git a/src/content/content.js b/src/content/content.js
index a74aa0c..fa87ba8 100644
--- a/src/content/content.js
+++ b/src/content/content.js
@@ -72,16 +72,24 @@ let notifyPage = () => {
   return false;
 }
 
-
+var queryingCanScript = false;
 async function init() {
+  if (queryingCanScript) return;
+  queryingCanScript = true;
+  debug(`NoScript init() called in document %s, scripting=%s, content type %s readyState %s`,
+    document.URL, canScript, document.contentType, document.readyState);
+  
   try {
     canScript = await browser.runtime.sendMessage({type: "canScript"});
     init = () => {};
     debug("canScript:", canScript);
   } catch (e) {
+    debug("Error querying canScript", e);
     // background script not initialized yet?
     setTimeout(() => init(), 100);
     return;
+  } finally {
+    queryingCanScript = false;
   }
 
   if (!canScript) onScriptDisabled();
-- 
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