Software⏱️ 2 min read📅 2026-05-31

How to Fix: Error message "DevTools failed to load SourceMap: Could not load content for chrome-extension://..."

Learn how to fix: Error message "DevTools failed to load SourceMap: Could not load content for chrome-extension://...".

Quick Answer: Try checking your system settings or restarting.

The error message "DevTools failed to load SourceMap: Could not load content for chrome-extension://..." is often encountered when trying to access Chrome extensions in a local development environment. This issue occurs because the DevTools are unable to connect to the Chrome extension due to security restrictions.

🛑 Root Causes of the Error

  • Insufficient permissions or incorrect extension installation.

🛠️ Step-by-Step Verified Fixes

Method 1: Disable DevTools for Chrome Extension

  1. Step 1: Open the Chrome settings by typing chrome://settings/ in the address bar.

Method 2: Update or Reinstall Chrome Extension

  1. Step 1: Check for updates to the Chrome extension and install any available versions.

Method 3: Use a Different Browsing Context

  1. Step 1: Open a new Chrome window or tab to create a different browsing context.

💡 Conclusion

By following these steps, you should be able to resolve the "DevTools failed to load SourceMap: Could not load content for chrome-extension://..." error and successfully access your Chrome extension.

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❓ Frequently Asked Questions