# Debug Switch for Tracy

> Turn the Tracy / Nette debug bar on and off per domain with one click. Sets or deletes the debug cookie (nette-debug, tracy-debug) and reloads the page. Unofficial tool, not affiliated with the Nette project.

Canonical page: [https://chrome-stats.com/d/debug-switch-for-tracy](https://chrome-stats.com/d/debug-switch-for-tracy)

## Overview

- **ID:** `debug-switch-for-tracy`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** martenb
- **Category:** web-development
- **Daily users:** 1
- **Version:** 1.1.0
- **Last updated:** 2026-08-07
- **First published:** 2026-08-04
- **Size:** 38 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/debug-switch-for-tracy/)

## Description

Nette and Tracy detect development mode from a cookie: Configurator::detectDebugMode() reads nette-debug, Tracy\Debugger::detectDebugMode() reads tracy-debug. The cookie value is a secret that the server matches as secret@IP.

This extension sets and removes that cookie for you, per domain, with its own secret and its own lifetime.

Features:
• Toolbar toggle for the current domain, state shown by the icon (colour = debug on, greyed out = off)
• Choose nette-debug, tracy-debug or a custom cookie name
• Separate secret per domain
• Cookie lifetime: session, or 1 to 90 days
• Scope: the exact host, or the domain including subdomains
• Optional page reload after toggling
• Alt+Shift+D keyboard shortcut
• Container tabs and private windows keep their own state
• Warns when a cookie with a different value is already set for the domain
• All domains managed in one place, with JSON export and import

The extension sends no data anywhere, has no analytics and makes no network requests. All configuration stays in local browser storage.

Note: the cookie alone does not enable debug mode. The server has to whitelist your secret, e.g. $configurator->setDebugMode('secret1234@1.2.3.4') or Debugger::enable(['secret1234@1.2.3.4']).

Unofficial tool, not affiliated with the Nette project or the authors of Tracy.

## Rankings

- #101,531 — Overall
- #53 — debug

## Permissions and access

### Permissions

- `cookies`
- `storage`

### Host permissions

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/debug-switch-for-tracy)