# Number Ninja

> Train your brain with fast mental math challenges. Answer multiple-choice arithmetic questions and improve your calculation speed in this fun popup game.

Canonical page: [https://chrome-stats.com/d/number-ninja](https://chrome-stats.com/d/number-ninja)

## Overview

- **ID:** `number-ninja`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed
- **Publisher:** Rosalie Fairchild
- **Version:** 1.0
- **Last updated:** 2026-07-06
- **First published:** 2026-07-03
- **Size:** 13 KB
- **Data as of:** 2026-08-17
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/number-ninja/)
- **Website:** [https://u888-s8.com/](https://u888-s8.com/)

## Description

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## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- This permission has no access or impact on the user's system or data, thus carrying no risk.
- 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

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- [QuickMath Pop Quiz](https://chrome-stats.com/d/quickmath-pop-quiz) — 1 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/number-ninja)