# Onyx

> Dark Custom theme for Firefox

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

## Overview

- **ID:** `onyx`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed (abandoned)
- **Publisher:** JEllis927
- **Version:** 1.0
- **Last updated:** 2020-07-28
- **First published:** 2020-07-28
- **Size:** 8.51 KB
- **Data as of:** 2026-07-30
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/onyx/)

## Description

Onyx is a Firefox add-on that offers a dark custom theme, allowing you to personalize your browsing experience with a sleek and stylish look. Enjoy a new aesthetic while browsing the web with Onyx.

## Safety

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

### Analysis details

- This permission has no access or impact on the user's system or data, thus carrying no risk.
- 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

- [Onyx Theme](https://chrome-stats.com/d/onyx-theme) — 7 users, 5.00 / 5
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- [Mattblack (Dark)](https://chrome-stats.com/d/mattblack)
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- [CB Black theme](https://chrome-stats.com/d/cb-black-theme)
- [RubyDark](https://chrome-stats.com/d/rubydark)
- [Dark Green Custom](https://chrome-stats.com/d/dark-green-custom) — 2 users

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