# Grayscale Bro

> A minimal Firefox extension for monochrome browsing. Supports dark theme and grayscale only on selected hostnames. \[Notice: Doesn't work at mozilla pages\]

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

## Overview

- **ID:** `grayscale-bro`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** xpmn
- **Category:** feeds-news-blogging,appearance,other
- **Daily users:** 522
- **Weekly downloads:** 5
- **Rating:** 4.50 / 5 (12 ratings)
- **Version:** 0.6.2
- **Last updated:** 2024-02-02
- **First published:** 2020-06-21
- **Size:** 18 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/grayscale-bro/)
- **Website:** [https://github.com/xpmn/firefox-grayscale](https://github.com/xpmn/firefox-grayscale)

## Description

Grayscale Bro is a minimal Firefox extension designed for users who prefer a monochrome browsing experience. It provides support for a dark theme and allows applying grayscale only on selected hostnames, enhancing focus and reducing color distractions. The extension leverages experimental features to deliver this functionality, though it may have some issues with pages that use `position:fixed` elements.

Please note that Grayscale Bro does not work on Mozilla pages. As an open-source project, the source code is available on GitHub for users interested in contributing or reviewing the code. This extension is ideal for users seeking a simple yet powerful tool to experience websites in grayscale with optional dark mode enhancements.

## Rankings

- #4,838 — Overall
- #271 — Feeds, News & Blogging
- #8 — pdf grayscale

## Permissions and access

### Permissions

- `tabs`
- `storage`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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).

## Review summary

Grayscale Bro is praised for effectively applying grayscale mode and allowing selective site control, providing a mostly smooth user experience. However, users frequently report problems with fullscreen videos and standalone images, including black screens and partial image visibility. Some also note color conversion inaccuracies on certain pages, suggesting improvements in grayscale processing would benefit the add-on.

### Pros

- Effectively converts web pages to grayscale as intended.
- Allows users to enable grayscale mode on selected websites only.
- User-friendly and works well across most websites.
- Good control features for managing grayscale application.

### Cons

- Issues with fullscreen videos or images showing a black screen while audio continues.
- Problem with images displayed alone where only the bottom half is visible, top half scrolls off-screen.
- Color conversion inaccuracies leading to unexpected color changes instead of proper grayscale on some pages.

## Similar extensions and apps

- [Dark Gray for Firefox](https://chrome-stats.com/d/dark-gray-for-firefox)
- [Gray Dark Theme](https://chrome-stats.com/d/gray-dark-theme)
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Source: [Chrome-Stats](https://chrome-stats.com/d/grayscale-bro)