Bypass bot identification systems

[Akaryatrh]

Feature Request

When running wxt in dev mode, chrome is seen as a bot by some websites (like leboncoin.fr that is using datadome). Although this kind of identification is legit, It's quite a blocker when developing extensions locally.

Is your feature request related to a bug?

"N/A"

What are the alternatives?

It's still possible to develop locally by installing built extension by hand on a regular browser (but then losing all the benefits of dev command)

Additional context

---

Here's what happens when running pnpm dev and using https://leboncoin.fr as a start url:

---

And being blocked once captcha is resolved manually.

[unrevised6419]

I have a similar issue for ChatGPT. The extension is the initial boilerplate.

I tried to start the browser using my daily used browser profile, where I'm logged in to ChatGPT.
Same story. First load is fine. Next reloads send me to Cloudlare Captcha

2025-11-27.18-24-27.mov

[Juknum]

I have the same issue on Chrome, Firefox doesn't seems to have that problem at all but that's a completly different "browser";

Thus, I may have found a workaround with Edge, you'll need to add the --disable-blink-features=AutomationControlled argument:

import { defineConfig } from 'wxt';

export default defineConfig({
  imports: false,
  modules: ['@wxt-dev/module-react'],
  srcDir: 'src',
  webExt: {
    chromiumArgs: [
      // TODO: Make it compatible with MacOS/Linux
      `--user-data-dir='C:\\Users\\${process.env.USERNAME}\\AppData\\Local\\Google\\Microsoft\\Edge\\User Data'`, 
      // Edge v143.0.3650.28 says it's not working anymore but it seems to still mitigate CloudFlare issues
      "--disable-blink-features=AutomationControlled"
    ],
    keepProfileChanges: true,
    binaries: {
      edge: "C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe",
    }
  },
  manifest: {
    browser_specific_settings: {
      gecko: {
        // @ts-ignore - WXT doesn't support this field yet but is required by Firefox
        // @see https://github.com/wxt-dev/wxt/pull/1976
        data_collection_permissions: {
          required: ['none']
        }
      }
    }
  }
});

[unrevised6419]

Hey, @Juknum thanks for the suggestion. From what I reading over internet, it seems this flag marks navigator.webdriver to true.

The navigator.webdriver property is true when in:

Chrome
The --enable-automation or --headless flag is used, or the --remote-debugging-port flag > specifying port 0 is used.

Firefox
The marionette.enabled preference or --marionette flag is passed.

– https://developer.mozilla.org/en-US/docs/Web/API/Navigator/webdriver

https://stackoverflow.com/a/78235138