Firefox is not supported in BiDi over CDP mode.

Error

Firefox is not supported in BiDi over CDP mode.

What it means

Puppeteer raised this from its WebDriver BiDi code. In practice, it usually means your script reached a browser, page, frame, element, or option state that the API cannot use safely.

How to fix it

• This API is not available through the WebDriver BiDi connection yet.
• Use the default CDP connection for this feature, or remove the unsupported option when launching/connecting with BiDi.

Minimal guard

try {
  // Run the Puppeteer operation that triggers this error.
} catch (error) {
  if (error instanceof Error && error.message.includes("Firefox is not supported in BiDi over CD")) {
    // Apply the fix above, then retry or fail with a clearer message.
  }
  throw error;
}