TabColorizer Firefox

TabColorizer

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

Features & Capabilities

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

  • Smart Domain Matching - Supports wildcards (*.test.example.com), automatic www-matching, and root domain inclusion
  • 5 Beautiful Themes - Choose from High Contrast, Nature, Industrial, Space, or Ocean with 15 colors each
  • Advanced Customization - Adjust border width (5-20px) and style (solid, dashed, dotted) per rule
  • Quick-Add Function - Add current domain with one click from the toolbar
  • Import/Export - Backup and share your rules as JSON files
  • Fully Accessible - WCAG 2.1 compliant with complete keyboard navigation and screen reader support
  • Multilingual - Available in English, German, French, and Spanish
🎯 Perfect For
  • Developers working with multiple environments
  • QA testers who need clear visual distinction
  • System administrators managing various servers
  • Anyone who wants to organize their browsing experience
🚀 How It Works
  1. Click the TabColorizer icon in your toolbar
  2. Add a domain and choose a color
  3. The website instantly gets a colored border
  4. Never confuse environments again!
📝 Example Rules 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!

User Growth & Download Statistics

Manifest V2 Add-on
By:
CBIndustries
Daily users:
6
Rating:
3.00
(1)
Version:
1.3.2 Last updated: 2025-10-23
Version code:
6058194
Creation date:
2025-10-20
Risk:
High risk impact High risk likelihood
Permissions:
Size:
46.63KB
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-17
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
CBIndustries
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/tabcolorizer/

User Reviews

The page border is helpful. Would love to have given this five stars if it changed the tab color as the name implies with an option to turn off the page border.
by te*****, 2026-03-16
View all user reviews ›

Is TabColorizer Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

TabColorizer requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
  • Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

TabColorizer may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** *** **** *******
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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