# LocatorJS

> A Firefox extension that allows you to click through from your React app to its code.

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

## Overview

- **ID:** `locatorjs`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Michael Musil
- **Category:** web-development
- **Daily users:** 312
- **Weekly downloads:** 11
- **Rating:** 5.00 / 5 (3 ratings)
- **Version:** 1.2.3
- **Last updated:** 2022-09-05
- **First published:** 2022-05-28
- **Size:** 204 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/locatorjs/)

## Description

LocatorJS is a Firefox extension designed specifically for ReactJS developers, allowing you to option-click (or alt-click) on any React app running in development mode to instantly jump to its underlying source code. This tool is especially useful during local development where React apps are commonly run in localhost environments. 

Built upon the open-source LocatorJS dev-stack plugin, this extension enhances productivity by seamlessly connecting what you see in the browser with the corresponding code, drastically simplifying debugging and code exploration workflows.

## Rankings

- #6,545 — Overall
- #33 — education
- #49 — catalog
- #54 — education
- #61 — category
- #90 — environment

## Permissions and access

### Permissions

- `storage`

### Content script matches

- `<all_urls>`

## Safety

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

## Similar extensions and apps

- [ComponentLocator](https://chrome-stats.com/d/componentlocator) — 2 users
- [Browser Extension Explorer](https://chrome-stats.com/d/browser-extension-explorer) — 2 users
- [LocatorLens – Smart Locator Automation](https://chrome-stats.com/d/locatorlens-playwright-tool) — 38 users, 5.00 / 5
- [React Performance Devtool](https://chrome-stats.com/d/nitin-tulswani) — 111 users, 1.00 / 5
- [localivelize](https://chrome-stats.com/d/localivelize) — 1 users
- [FicusJS devtools](https://chrome-stats.com/d/ficusjs-devtools)
- [LocatorHub](https://chrome-stats.com/d/locatorhub) — 4 users
- [React Developer Tools](https://chrome-stats.com/d/react-devtools) — 161,861 users, 4.59 / 5
- [React1s](https://chrome-stats.com/d/react1s) — 2 users
- [Svelte Reactive Debugger](https://chrome-stats.com/d/svelte-reactive-debugger) — 41 users, 5.00 / 5
- [Real-time Code Linter](https://chrome-stats.com/d/real-time-code-linter) — 1 users
- [Live Expression-Devloper Tool](https://chrome-stats.com/d/live-expression-devloper-tool) — 15 users, 3.50 / 5

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