Software⏱️ 2 min read📅 2026-06-15

How to Fix: How to always display the "advanced" panel on Firefox error screens

Firefox error screens with certificate problems and simplified messages.

Quick Answer: Use the about:config preference 'browser.display.error_messages' to show detailed error messages.

Firefox users are experiencing frustration with error screens that display simplified messages instead of detailed information about certificate problems. This issue affects users who want to view useful details about errors, such as "Your connection is not secure." The lack of this feature has led to the need for a workaround to restore the original behavior.

This guide aims to provide a solution for Firefox users who want to display the advanced panel on error screens. By following these steps, users can enable the detailed information display and avoid the frustration of simplified error messages.

🔍 Why This Happens

  • The main reason for this issue is the removal of the "Not show simplified error messages" setting from Firefox. This feature was previously available but has been deprecated in newer versions of the browser.
  • An alternative reason for this issue could be a change in the way Firefox handles certificate errors, which may be causing the advanced panel to be hidden by default.

🔧 Proven Troubleshooting Steps

Enabling the Detailed Error Messages via about:config

  1. Step 1: Open Firefox and type 'about:config' in the address bar. Press Enter to load the configuration page.
  2. Step 2: In the search bar at the top of the page, type "security.errorReporting.showAdvanced

Alternative Advanced Fix

    🎯 Final Words

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