Initial Query

What does "ERR_BLOCKED_BY_ORB" mean?

LLM Generation

Query

What does "ERR_BLOCKED_BY_ORB" mean?

Output

The **ERR_BLOCKED_BY_ORB** error occurs in Google Chrome and other Chromium-based browsers when a resource (like an image, script, or font) is blocked due to the **Opaque Response Blocking (ORB)** security feature. Here's what it means and why it happens: --- ### **What is ORB?** - **ORB** stands for **Opaque Response Blocking**, a security mechanism introduced in Chrome to prevent cross-origin information leaks. - It blocks requests for cross-origin resources that lack proper permission (via CORS headers) and return "opaque responses" (responses where the browser restricts access to the content for security reasons). --- ### **Why Does This Error Occur?** 1. **Cross-Origin Request Issues**: - A website tries to load a resource from a different domain (cross-origin) without proper CORS headers. - The server hosting the resource does not include valid `Access-Control-Allow-Origin` headers or other required CORS permissions. 2. **Opaque Response**: - The browser detects that the resource could leak sensitive data if accessed cross-origin, even if the request seems harmless (e.g., an image or script). 3. **Security Enforcement**: - ORB blocks the request proactively to protect users from potential cross-site data leaks. --- ### **How to Fix It** #### **For Website Developers**: 1. **Enable CORS Headers**: - Ensure the server hosting the resource includes proper CORS headers, such as: 

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     Access-Control-Allow-Origin: [requesting-domain] or *
     Access-Control-Allow-Methods: GET, POST, etc.
2. **Host Resources Locally**: - Serve the blocked resource from the same domain as your website to avoid cross-origin issues. 3. **Check Browser Console**: - Use Chrome DevTools (`F12`) to inspect the blocked request and verify CORS configuration. #### **For Users**: 1. **Contact the Website Owner**: - Report the error, as the issue requires server-side fixes. 2. **Temporary Workarounds** (not recommended for security): - Disable browser extensions (e.g., ad blockers) that might interfere. - Use a different browser (though ORB is becoming standard in modern browsers). --- ### **Example Scenario** If a website `example.com` tries to load a font from `fonts.com` without CORS headers, Chrome blocks it with `ERR_BLOCKED_BY_ORB`. The fix requires `fonts.com` to send CORS headers allowing `example.com` to access the resource. --- ORB is part of broader efforts to enhance web security. Developers should ensure cross-origin resources follow CORS best practices to avoid this error.

Substring Evaluation

Testing if the previous output contains the string opaque resource blocking: False