# Firelux

> Reduces the color temperature of the browser by adding a filter on web pages.

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

## Overview

- **ID:** `firelux`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** ValentinG\_
- **Category:** appearance
- **Daily users:** 1,127
- **Weekly downloads:** 23
- **Rating:** 4.80 / 5 (20 ratings)
- **Version:** 2.0.1.0
- **Last updated:** 2020-06-02
- **First published:** 2016-03-16
- **Size:** 84 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/firelux/)
- **Website:** [https://framagit.org/ValentinG/firelux2](https://framagit.org/ValentinG/firelux2)

## Description

Firelux is a Chrome extension designed to reduce blue light exposure by applying a customizable color filter directly onto web pages. Users can select the filter color and intensity, set automatic activation hours, and even deactivate the filter on specific websites. The extension operates completely offline, ensuring that no personal information is collected or transmitted.

Easy to configure via its icon panel, Firelux supports Firefox Sync for setting synchronization and provides options for fine-tuning your browsing comfort. For feedback, issues, and feature requests, users can visit the project's Framagit or GitHub pages. This tool is ideal for anyone seeking to reduce eye strain and improve visual comfort while browsing at night or in low-light environments.

## Rankings

- #3,082 — Overall
- #16 — temperature
- #25 — deactivate
- #38 — reduce
- #156 — configure

## Permissions and access

### Permissions

- `storage`
- `tabs`

### 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

Users repeatedly praise Firelux for reducing eye strain, preserving site colors (better than alternatives), and having responsive developer support. Common problems reported by multiple users are occasional sudden failures/crashes and YouTube compatibility issues (blank video or blocked Picture-in-Picture). Overall feedback is strongly positive but tempered by reliability and video-site compatibility concerns.

### Pros

- Reduces eye strain and makes browsing more comfortable (several users said it helped their eyes)
- Preserves website colors with minimal distortion compared with other dark-mode extensions (explicitly preferred over Dark Reader)
- Active, responsive developer support—users praised the author’s responsiveness and fixes
- Good substitute when switching from Chrome to Firefox; users say it works well as a replacement for similar extensions

### Cons

- Occasionally stops working or crashes unexpectedly (multiple reports of it suddenly failing)
- Compatibility issues with YouTube — reports of blank video display (on Nightly) and interference with Picture-in-Picture

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