Basilakis · January 26, 2021 09:26 · Feb 23, 2018
diff --git a/Preventing-Puppeteer-Detection.md b/Preventing-Puppeteer-Detection.md
@@ -0,0 +1,52 @@
+I’m looking for any tips or tricks for making chrome headless mode less detectable. Here is what I’ve done so far:
+
+Set my args as follows:
+```js
+const run = (async () => {
+
+    const args = [
+        '--no-sandbox',
+        '--disable-setuid-sandbox',
+        '--disable-infobars',
+        '--window-position=0,0',
+        '--ignore-certifcate-errors',
+        '--ignore-certifcate-errors-spki-list',
+        '--user-agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3312.0 Safari/537.36"'
+    ];
+
+    const options = {
+        args,
+        headless: true,
+        ignoreHTTPSErrors: true,
+        userDataDir: './tmp'
+    };
+
+    const browser = await puppeteer.launch(options);
+```
+
+I’m loading in a preload file that overrides some window.navigator globals:
+
+```js
+    const preloadFile = fs.readFileSync('./preload.js', 'utf8');
+    await page.evaluateOnNewDocument(preloadFile);
+```
+
+##### preload.js
+```js
+// overwrite the `languages` property to use a custom getter
+Object.defineProperty(navigator, "languages", {
+  get: function() {
+    return ["en-US", "en"];
+  };
+});
+
+// overwrite the `plugins` property to use a custom getter
+Object.defineProperty(navigator, 'plugins', {
+  get: function() {
+    // this just needs to have `length > 0`, but we could mock the plugins too
+    return [1, 2, 3, 4, 5];
+  },
+});
+```
+
+I see there are some other things suggested here https://intoli.com/blog/making-chrome-headless-undetectable/ but I'm not 100% certain how to implement them in puppeteer. Any ideas tips or tricks?