# TabColorizer

> Colors browser tabs / websites with customizable borders to visually distinguish between test, training, and production environments. Supports wildcards and 4 languages.

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

## Overview

- **ID:** `tabcolorizer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** CBIndustries
- **Category:** web-development,alerts-updates,tabs
- **Daily users:** 10
- **Weekly downloads:** 3
- **Rating:** 3.00 / 5 (1 ratings)
- **Version:** 1.3.2
- **Last updated:** 2025-10-23
- **First published:** 2025-10-20
- **Size:** 47 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/tabcolorizer/)

## Description

TabColorizer - Visual Environment Distinction

Instantly identify which environment you're working in! TabColorizer adds customizable colored borders to websites, making it impossible to confuse your test, training, and production systems.

✨ Key Features
<ul><li><strong>Smart Domain Matching</strong> - Supports wildcards (*.test.example.com), automatic www-matching, and root domain inclusion</li><li><strong>5 Beautiful Themes</strong> - Choose from High Contrast, Nature, Industrial, Space, or Ocean with 15 colors each</li><li><strong>Advanced Customization</strong> - Adjust border width (5-20px) and style (solid, dashed, dotted) per rule</li><li><strong>Quick-Add Function</strong> - Add current domain with one click from the toolbar</li><li><strong>Import/Export</strong> - Backup and share your rules as JSON files</li><li><strong>Fully Accessible</strong> - WCAG 2.1 compliant with complete keyboard navigation and screen reader support</li><li><strong>Multilingual</strong> - Available in English, German, French, and Spanish</li></ul>
🎯 Perfect For
<ul><li>Developers working with multiple environments</li><li>QA testers who need clear visual distinction</li><li>System administrators managing various servers</li><li>Anyone who wants to organize their browsing experience</li></ul>
🚀 How It Works
<ol><li>Click the TabColorizer icon in your toolbar</li><li>Add a domain and choose a color</li><li>The website instantly gets a colored border</li><li>Never confuse environments again!</li></ol>
📝 Example Rules
<ul><li><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/658e733cb7a6b5dacbcbe9e6eedcbd396db9cff1942af626913d9d3a5e2ef8a0/http%3A//production.company.com" rel="nofollow">production.company.com</a> → Red border (danger zone!)</li><li><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/6d492420007e28088beac68518819673835ca3012ed063a1664711415933f6b9/http%3A//staging.company.com" rel="nofollow">staging.company.com</a> → Yellow border (caution)</li><li><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/03e28110ccf43a65120f6f7baa9864dd69677d056fe4c4e84a83f460ebe26fc1/http%3A//test.company.com" rel="nofollow">test.company.com</a> → Green border (safe to test)</li><li>localhost → Blue border (local development)</li></ul>
Privacy First

TabColorizer works completely offline. No data is collected, no analytics, no external connections. Your rules stay on your device.

Open Source

Developed with ❤️ for the Firefox community. Suggestions and feedback are always welcome!

## Rankings

- #33,393 — Overall
- #83 — environment

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate 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).

## Similar extensions and apps

- [ColorTabs](https://chrome-stats.com/d/colortabs) — 263 users, 4.00 / 5
- [Env Border](https://chrome-stats.com/d/env-border) — 2 users
- [Frame Color per Site](https://chrome-stats.com/d/frame-color-per-site) — 2 users
- [URLColors](https://chrome-stats.com/d/url-colors) — 109 users, 4.00 / 5
- [Tab Favicon Labeler](https://chrome-stats.com/d/tab-favicon-labeler) — 3 users
- [Colorful Tab Highlighter](https://chrome-stats.com/d/colorful-tab-highlighter) — 7 users, 1.00 / 5
- [Website color coding](https://chrome-stats.com/d/website-color-coding)
- [RainbowTabs](https://chrome-stats.com/d/rainbowtabs) — 20 users
- [ColorTabs For Firefox](https://chrome-stats.com/d/colortabs-for-firefox) — 58 users, 4.00 / 5
- [Tab Color Changer](https://chrome-stats.com/d/tab-color-changer) — 1 users, 1.00 / 5
- [Enviro-Shade](https://chrome-stats.com/d/enviro-shade) — 2 users, 5.00 / 5
- [Tab Colors](https://chrome-stats.com/d/tabcolors) — 175 users, 3.09 / 5

---

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