ERR_DISALLOWED_URL_SCHEME

ERR_DISALLOWED_URL_SCHEME Error

Category: Browser Errors | Platforms: chrome android ios

What This Error Means

The ERR_DISALLOWED_URL_SCHEME error occurs when a website tries to navigate to a URL scheme (protocol) that the browser explicitly blocks for security or privacy reasons. For example, trying to execute `javascript:` URLs from the address bar or linking to internal system protocols.

Common Causes

  • Trying to run JavaScript code directly from the address bar (blocked in modern browsers).
  • Links to `chrome://` or `about:` pages from a regular website.
  • Malicious sites trying to exploit unsafe protocols.
  • Using a custom protocol that has been deprecated or banned.

How to Fix It (For Users)

  1. 1 Do not try to run scripts from the address bar.
  2. 2 Manually type system URLs (like `chrome://settings`) instead of clicking links.
  3. 3 Update your browser.

For Site Owners / Developers

  1. Remove links to `javascript:` or internal browser pages.
  2. Use standard event handlers (onclick) instead of `javascript:` links.
  3. Ensure you are not linking to restricted schemes.

When It Is NOT Your Fault

If the browser blocks a scheme for security reasons.

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