# LeetCode Contest Helper

> Help contestants succeed in LeetCode contests with testcase loading, result checking, on-tab state icons, and test code generation.

Canonical page: [https://chrome-stats.com/d/leetcode-contest-helper](https://chrome-stats.com/d/leetcode-contest-helper)

## Overview

- **ID:** `leetcode-contest-helper`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** imozo studio
- **Category:** other
- **Daily users:** 1
- **Version:** 2.3.7
- **Last updated:** 2024-04-21
- **First published:** 2022-11-21
- **Size:** 90 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/leetcode-contest-helper/)

## Description

Extension Features:

1. Activate Custom Testcase.
2. Populate Custom Testcase with examples.
3. Check Run Code results against examples in contests.
4. Check Run Code results against the expected answers in contests practice mode.
5. Highlight Run Code results (including input and answers) with red/green colors.
6. Display Run Code and Submission state icon on the browser tab.
7. Copy IDE-runnable code along with example test cases in supported languages (currently C++, C#, and Java).

Use this extension on:

* LeetCode global website <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/46789bf1eadef441e1a138c754d9d5ca7dc7ed71c3af2455dc252ea39e1124d4/https%3A//leetcode.com/" rel="nofollow">https://leetcode.com/</a>
* LeetCode Chinese website <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/d17db1fd18cef2c10d2ad73e10d2cc3d9a6d1bbce140fb4999dec65a6a5d485d/https%3A//leetcode.cn/" rel="nofollow">https://leetcode.cn/</a>

## Rankings

- #125,393 — Overall
- #56 — leetcode

## Permissions and access

### Content script matches

- `leetcode.com`
- `leetcode.cn`
- `leetcode-cn.com`

## Safety

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

### Analysis details

- Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial 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).

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Source: [Chrome-Stats](https://chrome-stats.com/d/leetcode-contest-helper)