From e76f46d33e7380cf212429dfe895bca056dfab32 Mon Sep 17 00:00:00 2001
From: imnyang <imnyang@pm.me>
Date: Mon, 27 Jul 2026 12:10:06 +0900
Subject: [PATCH] Add background.js

---
 background.js | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 background.js

diff --git a/background.js b/background.js
new file mode 100644
index 0000000..b2a85d4
--- /dev/null
+++ b/background.js
@@ -0,0 +1,40 @@
+"use strict";
+
+const WINDOWS_CHROME_UA =
+  "Mozilla/5.0 (Windows NT 10.0; Win64; x64) " +
+  "AppleWebKit/537.36 (KHTML, like Gecko) " +
+  "Chrome/140.0.0.0 Safari/537.36";
+
+browser.webRequest.onBeforeSendHeaders.addListener(
+  (details) => {
+    const requestHeaders = details.requestHeaders ?? [];
+    let foundUserAgent = false;
+
+    for (const header of requestHeaders) {
+      if (header.name.toLowerCase() === "user-agent") {
+        header.value = WINDOWS_CHROME_UA;
+        foundUserAgent = true;
+        break;
+      }
+    }
+
+    if (!foundUserAgent) {
+      requestHeaders.push({
+        name: "User-Agent",
+        value: WINDOWS_CHROME_UA
+      });
+    }
+
+    return { requestHeaders };
+  },
+  {
+    urls: [
+      "*://netflix.com/*",
+      "*://*.netflix.com/*"
+    ]
+  },
+  [
+    "blocking",
+    "requestHeaders"
+  ]
+);
\ No newline at end of file