Environment Marker Firefox

Environment Marker

Use the Environment Marker extension and prevent screw-ups with the (programming) environments.

Features & Capabilities

This extension helps you visually distinguish between different environments by adding a colored label to specified websites based on URL configurations. It supports regular expressions (including wildcards), a color picker, and positioning preferences.

Why Use Environment Marker? In IT projects, working with multiple environments—such as development, QA, staging, and production—is common. However, since these environments often look identical, mistakes can happen.

Have you ever intended to run a "quick test" in the development environment, only to realize too late that you were actually in production? Misconfigurations and accidental changes can easily occur because the only visible difference is the discreet URL in the browser's address bar.

That is where Environment Marker comes in. This free and open-source extension lets you define your project’s environment URLs and assign a colored label in the browser window to identify them at a glance.

No more screw-ups in the production environment!

Features:

  • Customizable labels – Choose label colors with a color picker.
  • Regular expression support – Use regex patterns to match URLs dynamically.
  • Flexible label positioning – Place the label in any corner: Top-right, Top-left, Bottom-right, Bottom-left or Moldure.
  • Quick Config mode – A fast and easy setup option.
  • Export & Import settings – Backup and restore configurations effortlessly.

Latest Release – v1.2.1 Important: Before updating, export your settings for backup.

What’s New? ✔ Minor bug fixes. ✔ Added support for ribbon transparency.

Environment Marker is open-source, and contributions are welcome! GitHub: https://github.com/geovanneb/envmarker

https://www.youtube.com/watch?v=EQR__eJkLUw

User Growth & Download Statistics

Manifest V3 Add-on
By:
Environment Marker
Daily users:
225 13
Rating:
5.00
(1)
Version:
1.2.1 Last updated: 2025-03-08
Version code:
5906303
Creation date:
2025-02-20
Risk:
Moderate risk impact Low risk likelihood
Permissions:
Host permissions:
  • <all_urls>
Content scripts matches:
  • <all_urls>
Size:
160.07KB
Email:
ge*****@gmail.com
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-19
Compare stats and ranking:

Other platforms

Chrome
Environment Marker (v1.2.1)
40,000 4.83 (58)

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:
Environment Marker
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/environment-marker-extension/
Email:
ge*****@gmail.com
Website:
https://environmentmarker.io

Is Environment Marker 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.

Environment Marker requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
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.

Environment Marker has earned a fairly good reputation and likely can be trusted.

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