# source-map-explorer-devtools

> Adds a new panel to the developer tools that shows you a breakdown of css and js files in the page based on their sourcemaps

Canonical page: [https://chrome-stats.com/d/source-map-explorer-devtools](https://chrome-stats.com/d/source-map-explorer-devtools)

## Overview

- **ID:** `source-map-explorer-devtools`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Marius Gundersen
- **Category:** web-development
- **Daily users:** 18
- **Version:** 1.0.1
- **Last updated:** 2023-10-04
- **First published:** 2023-10-03
- **Size:** 72 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/source-map-explorer-devtools/)

## Description

This is based on the <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/3fa7ccd9ed9f9bfae6894eb6b8e60fd6b4e1b74b2fb2c829094e9fadcdc2b3c0/https%3A//github.com/danvk/source-map-explorer" rel="nofollow">source-map-explorer</a> package by <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/b2c4a45d093ad1236ded472091b6108aa336fb4f18b4f12ee6279d26e337691c/https%3A//github.com/danvk" rel="nofollow">Dan Vanderkam</a>.

## Rankings

- #25,798 — Overall
- #31 — block explorer
- #47 — explore
- #56 — source code
- #58 — source
- #75 — resource

## Permissions and access

### Permissions

- `<all_urls>`

## Safety

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

- [sourcemap-hunter](https://chrome-stats.com/d/sourcemap-hunter) — 5 users
- [Custom Sourcemaps](https://chrome-stats.com/d/custom_sourcemaps) — 5 users
- [Multi-Panel Source Viewer](https://chrome-stats.com/d/multi-panel-source-viewer)
- [sauce extension](https://chrome-stats.com/d/sauce-extension) — 1 users
- [Source Map Downloader](https://chrome-stats.com/d/source-map-downloader) — 12 users, 5.00 / 5
- [Sources to Folders](https://chrome-stats.com/d/sources-to-folders) — 7 users
- [GitHub Source Code Minimap](https://chrome-stats.com/d/gh-minimap) — 5 users, 2.50 / 5
- [ECSY Developer tools](https://chrome-stats.com/d/ecsy-devtools) — 4 users
- [devtools Extension](https://chrome-stats.com/d/devtools-panels-wwh3) — 1 users
- [DevScope - Developer Diagnostics](https://chrome-stats.com/d/devscope) — 1 users
- [Vue.js devtools](https://chrome-stats.com/d/vue-js-devtls) — 19 users
- [ES6 Script Editor for Developer Tools](https://chrome-stats.com/d/es6-script-editor) — 1 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/source-map-explorer-devtools)