# WikimediaDebug

> Control the X-Wikimedia-Debug header on HTTP requests.

Canonical page: [https://chrome-stats.com/d/wikimedia-debug-header](https://chrome-stats.com/d/wikimedia-debug-header)

## Overview

- **ID:** `wikimedia-debug-header`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Timo Tijhof
- **Category:** web-development,other
- **Daily users:** 70
- **Weekly downloads:** 3
- **Rating:** 5.00 / 5 (4 ratings)
- **Version:** 3.2.0
- **Last updated:** 2025-06-28
- **First published:** 2015-01-18
- **Size:** 151 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/wikimedia-debug-header/)
- **Website:** [https://wikitech.wikimedia.org/wiki/WikimediaDebug](https://wikitech.wikimedia.org/wiki/WikimediaDebug)

## Description

WikimediaDebug is a Chrome extension designed for developers working with the MediaWiki platform, used by Wikimedia Foundation projects. It injects the X-Wikimedia-Debug HTTP header into requests made only to Wikimedia Foundation websites. This controlled injection enables developers to bypass caching by routing requests directly to a selected debug server, facilitating effective debugging and development workflows. With WikimediaDebug, developers gain precise control over HTTP request headers for easier troubleshooting and testing of MediaWiki-based content.

## Rankings

- #13,842 — Overall
- #7 — debug
- #122 — wiki
- #157 — wikipedia
- #184 — media
- #194 — request

## Permissions and access

### Permissions

- `alarms`
- `storage`
- `tabs`
- `webRequest`
- `declarativeNetRequestWithHostAccess`

### Host permissions

- `*://*.mediawiki.org/*`
- `*://*.wikidata.org/*`
- `*://*.wikifunctions.org/*`
- `*://*.wikibooks.org/*`
- `*://*.wikimedia.org/*`
- `*://*.wikinews.org/*`
- `*://*.wikipedia.org/*`
- `*://*.wikiquote.org/*`
- `*://*.wikisource.org/*`
- `*://*.wikiversity.org/*`
- `*://*.wikivoyage.org/*`
- `*://*.wiktionary.org/*`
- `*://*.beta.wmcloud.org/*`
- `*://*.beta.wmflabs.org/*`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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).

## Similar extensions and apps

- [WikimediaDebug](https://chrome-stats.com/d/wikimediadebug)
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Source: [Chrome-Stats](https://chrome-stats.com/d/wikimedia-debug-header)