File System Access

Name: File System Access
Rating: 3.3333 (3 reviews)
Author: sycxyc

By: sycxyc

The File System Access API allows web apps to interact with files on the local device.

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Features & Capabilities

The File System Access Chrome extension brings the File System Access API to browsers, enabling web applications like vscode.dev to interact seamlessly with local files and directories. It implements core file picker functions such as showOpenFilePicker, showDirectoryPicker, and showSaveFilePicker, allowing users to open, save, and select directories within web apps.

Since direct local file operations are outside the browser's default capabilities, a helper application must be installed to facilitate these tasks securely. Additionally, this extension supports providing the File System Access API to other compatible WebExtensions and integrates optional code editor features through a separate Code Editor extension. Although there are some limitations, such as cloning FileSystemHandle instances and worker context support, the extension is open source and actively maintained, offering developers powerful tools to enhance browser-based file management.

User Growth & Download Statistics

Add-on Developer Tools Programming

By:

sycxyc

Daily users:

152 3

Rating:

3.33

(3)

Version:

0.9.4 Last updated: 2024-01-26

Version code:

5682821

Creation date:

2023-03-26

Risk:

Permissions:

Size:

99.08KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 9,185 ▲ 98

Other rankings

#4 in system keyword 17

#14 in free access keyword 54

#23 in file keyword 38 ▲ 1

#143 in device keyword 18 ▲ 1

#158 in film keyword 10 ▲ 2

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

sycxyc

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/file-system-access/

Website:

https://github.com/ichaoX/ext-file/issues

User Reviews

Works perfectly and helps me not need to use edge or chrome to use websites that make use of showOpenFilePicker

by AD*****, 2025-07-03

Do not waste your time, this app does not work. It keeps saying the port is disconnected, and the documentation says nothing about this. The messaging host manifest is present and point to the right file.

by Lo*****, 2024-12-22

Works as expected. It allows me to use sites that require the FileSystem API. It also implements permissions, so I can allow/deny a site that immediately asks for it. Would be nice if I could disable the extension on a specific site to prevent fingerprinting, where the extension pretends not to exist at all.

by Co*****, 2024-04-06

View all user reviews ›

Is File System Access Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

File System Access requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

File System Access has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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