debug
Show console errors and failed network requests
Source facts
- Repository
- mozilla/firefox-devtools-mcp
- Last source activity
- August 21, 2026 at 16:35
- Detected SKILL.md language
- English
- Stars
- 496
- Forks
- 68
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Source instructions · Read-only preview- 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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