WebSerial for Firefox

Name: WebSerial for Firefox
Rating: 4.2105 (19 reviews)
Author: kuba2k2

By: kuba2k2

WebSerial API Polyfill for Mozilla Firefox browser

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Install

Features & Capabilities

WebSerial for Firefox is a polyfill that lets you use the Web Serial API in Mozilla Firefox by pairing the browser with a native host application. It provides cross-platform support (Windows, Linux, macOS) and automatically prompts to install the native component when you first open a serial port.

The add-on is open source and ships binaries built with GitHub Actions. For installation instructions and the source repository, see the project page and the GitHub links, and consider supporting the project via Ko-fi.

User Growth & Download Statistics

Add-on Developer Tools Open Source Programming

By:

kuba2k2

Daily users:

3,058 -38

Rating:

4.21

(19)

Version:

0.5.0 Last updated: 2026-01-15

Version code:

6122220

Creation date:

2023-08-29

Risk:

Permissions:

Content scripts matches:

Size:

200.01KB

Email:

ku*****@szczodrzynski.pl

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-20

Compare stats and ranking:

Ranking

# 1,656 ▼ 19

Other rankings

#261 in Other extensions ▼ 5

#5 in trial keyword 14

#31 in firefox keyword 24 ▲ 1

#72 in foe keyword 20

#100 in dial keyword 50 ▲ 1

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For Developers

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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:

kuba2k2

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/webserial-for-firefox/

Email:

ku*****@szczodrzynski.pl

Website:

https://github.com/kuba2k2/firefox-webserial

User Reviews

by Ms*****, 2026-05-24

Essential if you want to update USB devices over a website. (You need to install an additional app form this dev to work!)

by Ar*****, 2026-02-08

Hi, very cool, ok with my win10. Just a lake: I can't execute my script with local url like file:///C:/htdocs/arduino_web_controller.html (ok with Chrome, Edge).

by jm*****, 2026-02-05

View all user reviews ›

Is WebSerial for Firefox 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.

WebSerial for Firefox 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.
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
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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.

WebSerial for Firefox is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

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