Show console errors and failed network requests
Scanned 8/30/2026
Skills Directorynpx -y skills add mozilla/firefox-devtools-mcp --skill debug --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: debug
description: Show console errors and failed network requests
argument-hint: [console|network|all]
disable-model-invocation: true
---
# /firefox-devtools-mcp:debug
Displays debugging information from the current page.
## Usage
```
/firefox-devtools-mcp:debug # Show all (console errors + failed requests)
/firefox-devtools-mcp:debug console # Console messages only
/firefox-devtools-mcp:debug network # Network requests only
```
## Examples
```
/firefox-devtools-mcp:debug
/firefox-devtools-mcp:debug console
/firefox-devtools-mcp:debug network
```
## What Happens
- `console`: Calls `list_console_messages` with `level="error"`
- `network`: Calls `list_network_requests` with `statusMin=400`
- `all` (default): Shows both console errors and failed network requests
Requires Firefox to already be running and on the page you want to debug. If Firefox is not running or is on about:blank, call `navigate_page` first.
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