# Opera Dark GreyLine

> Dark Grey Theme For Firefox.

Canonical page: [https://chrome-stats.com/d/opera-dark-greyline](https://chrome-stats.com/d/opera-dark-greyline)

## Overview

- **ID:** `opera-dark-greyline`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed (abandoned)
- **Publisher:** seriouslymad
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0
- **Last updated:** 2021-10-07
- **First published:** 2021-10-07
- **Size:** 7.63 KB
- **Data as of:** 2026-08-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/opera-dark-greyline/)

## Description

Opera Dark GreyLine is a Firefox add-on that offers a stunning dark grey theme to enhance your browsing experience. Customize your Firefox with this sleek and modern design to give it a sophisticated look.

## Safety

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

- [Grey Dark](https://chrome-stats.com/d/grey-dark) — 4 users
- [Dark & Gray Firefox](https://chrome-stats.com/d/dark-gray-firefox) — 5.00 / 5
- [Dark Mode/Dark Grey Theme](https://chrome-stats.com/d/dark-mode-dark-grey-theme)
- [Dark gray](https://chrome-stats.com/d/dark-gray-by-szivacs) — 2 users, 3.00 / 5
- [Dark Gray Custom](https://chrome-stats.com/d/dark-gray-custom) — 1 users
- [Gray Dark Theme](https://chrome-stats.com/d/gray-dark-theme)
- [Dark gray theme](https://chrome-stats.com/d/dark-gray-theme) — 4.00 / 5
- [The Gray Blue](https://chrome-stats.com/d/the-gray-blue)
- [Dark Green Theme](https://chrome-stats.com/d/dark-green-theme) — 9 users
- [Dark theme - Real Dark and Gray](https://chrome-stats.com/d/dark-theme-real-dark-and-gray)
- [Darky](https://chrome-stats.com/d/darkytheme)
- [Greytheme1234](https://chrome-stats.com/d/greytheme1234)

---

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