Fix Chrome Debugger Warning

Published · Updated

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If you’re using ClickRoutine or a CAPTCHA solver like NopeCHA, you may have noticed a banner at the top of Chrome that says something like:

“NopeCHA started debugging this browser”

It appears when the extension is active on a site and stays until you dismiss it. It’s harmless, but it’s annoying. Here’s how to get rid of it.

Why Chrome shows this message

Extensions that automate browser actions — like clicking buttons, navigating pages, or solving CAPTCHAs — use Chrome’s Debugger API to interact with the browser in a trusted way. Google added this mandatory warning specifically to protect users: it makes sure you know when an extension is using that access, so malicious software can’t do it silently.

That’s a reasonable thing for Google to do. But when you’re intentionally running tools like ClickRoutine and NopeCHA, the warning is just noise.

Only suppress it if you trust every extension you have installed. If you’re not sure, take a minute to review your installed extensions before proceeding.

How to remove the warning on Windows

  1. Find your Chrome shortcut — on your Desktop or Taskbar. Right-click it and select Properties.
  2. In the Shortcut tab, find the Target field. It’ll look something like: "C:\Program Files\Google\Chrome\Application\chrome.exe"
  3. Click at the very end of that text (after the closing quote) and add: --silent-debugger-extension-api
  4. The full Target should now look like: "C:\Program Files\Google\Chrome\Application\chrome.exe" --silent-debugger-extension-api
  5. Click Apply, then OK.
  6. Completely close Chrome and relaunch it using this shortcut.

The warning won’t appear again as long as you launch Chrome from this shortcut.

How to remove the warning on macOS

macOS doesn’t have a simple shortcut properties dialog, so you’ll create a small launcher app instead.

  1. Open Script Editor (press Cmd + Space, type “Script Editor”, hit Enter).
  2. Paste this script: 
    do shell script "open -a '/Applications/Google Chrome.app' --args --silent-debugger-extension-api"
  3. Go to File → Save.
  4. Name it something like Chrome No Debugger.
  5. Set File Format to Application.
  6. Save it somewhere convenient (Desktop or Applications folder).

From now on, launch Chrome using this app instead of the regular Chrome icon. The warning won’t appear.

Does this affect anything else?

No. The --silent-debugger-extension-api flag only suppresses the visual banner. It doesn’t change how extensions work, doesn’t disable any security features, and doesn’t affect your browsing in any other way. Your extensions still have exactly the same access they had before — you just won’t see the notification every time.