# OPFS Browser

> View and edit the OPFS file system in the debug tools.

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

## Overview

- **ID:** `opfs-browser`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** JCHU634
- **Category:** web-development
- **Daily users:** 224
- **Weekly downloads:** 18
- **Rating:** 5.00 / 5 (3 ratings)
- **Version:** 1.0.3
- **Last updated:** 2025-10-24
- **First published:** 2025-07-11
- **Size:** 189 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/opfs-browser/)

## Description

OPFS Browser is a lightweight Chrome DevTools extension that lets developers inspect and manage the Origin Private File System (OPFS) used by web apps. From the OPFS Browser tab you can view directory trees, open files, download assets, and upload files back into OPFS — all without leaving DevTools.

Install and open DevTools → OPFS Browser to start. Try the OPFS test page ([https://jchu634.github.io/opfs-test/](https://jchu634.github.io/opfs-test/)) and view or contribute to the source on GitHub ([https://github.com/jchu634/OPFS-Browser](https://github.com/jchu634/OPFS-Browser)). Ideal for debugging file-backed web apps and quick OPFS content management.

## Rankings

- #7,745 — Overall
- #39 — browser
- #41 — browser tab
- #63 — chrome browser
- #97 — grow
- #111 — debug

## Permissions and access

### Permissions

- `activeTab`

### Content script matches

- `<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).

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