# Nightly Tester Tools

> Nightly Tester Tools (NTT) is an add-on for aiding testers of Nightly builds of Mozilla apps including Firefox.

Canonical page: [https://chrome-stats.com/d/nightly-tester-tools](https://chrome-stats.com/d/nightly-tester-tools)

## Overview

- **ID:** `nightly-tester-tools`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Automation Development
- **Category:** other
- **Daily users:** 1,176
- **Weekly downloads:** 3
- **Rating:** 3.73 / 5 (33 ratings)
- **Version:** 4.1resigned1
- **Last updated:** 2024-04-25
- **First published:** 2008-02-18
- **Size:** 34 KB
- **Data as of:** 2026-09-13
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/nightly-tester-tools/)
- **Website:** [https://github.com/mozilla/nightlytt/issues](https://github.com/mozilla/nightlytt/issues)

## Description

Nightly Tester Tools (NTT) is a Firefox add-on designed to assist testers working with Nightly builds of Mozilla applications. It offers features such as copying the current build ID or listing installed extensions directly to the clipboard via a toolbar button. Additionally, users can insert this information into textboxes using the context menu and customize the browser's title bar for easier identification.

This extension supports multiple languages including English, Chinese (Simplified), Czech, Japanese, Polish, Russian, and Swedish. While it provides essential functionality for Nightly build testers, some features from the original XUL-based version remain unimplemented due to WebExtensions API limitations. For more details and source code, visit the [Mozilla Wiki](https://wiki.mozilla.org/QA/Automation/Projects/Addons/NightlyTesterTools) and the [GitHub repository](http://github.com/mozilla/nightlytt).

## Rankings

- #3,074 — Overall
- #11 — tools
- #35 — night mode
- #42 — build
- #47 — tool
- #58 — include

## Permissions and access

### Permissions

- `clipboardWrite`
- `management`
- `menus`
- `storage`
- `tabs`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low 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).

## Review summary

### Pros

- Allows customization of the title bar for identifying different profiles.
- Some users find it useful for forcing add-on compatibility.

### Cons

- Does not integrate into the tools menu, limiting access to features.
- Profile name is no longer a variable for title bar customization, requiring hard-coding.
- Limited relevant functionalities due to restrictions from WebExtensionAPI.

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Source: [Chrome-Stats](https://chrome-stats.com/d/nightly-tester-tools)