Environment Indicator
Developer Tools
Add an environment marker to differentiate QA environments from production. In addition, you can create your own indicator rules
Users
3K
Rating
4.3
Reviews
6
7D Growth
0|0%
Stable signalUnknownHigh-risk permissions
URLColors
A chrome extension that adds a colored border around websites that match user inputted preferences.
Users9KCurrent public install base
Rating4.7Store average score
Reviews46Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
2 assetsURLColors Media preview
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Start
4.71
Latest
4.72
7-day rating change
+0.01
2026年7月15日2026年7月21日
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00%Technical snapshot
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Version2.2
ManifestV3
Size18.07KiB
Languages1English (United States)
Published
Store updated
Last crawled
English (United States)
Overview
Product summary
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This extension allows you to flag specified websites by highlighting the website with a custom colored border. This is especially useful for developers who run their web applications on many different environments and who are constantly switching between a dev, test, and production version of an app or database. Because the application may look the same on all environments, it's easy to accidentally do something on the production environment that shouldn't have been done.
With URL Colors, you can easily have the browser flag important websites for you by specifying a the keyword to match against the tab url, the border color, width, opacity, whether or not the border should blink, and the interval of blinking. The wildcard character (*) is now supported.
It also has a demo mode, or snooze mode, so you can shut if off while presenting for a specified period of time, without worrying about reactivating it later. It automatically turns back on for you!
Want to add functionality or tweak something? Please contribute here: https://github.com/fej-snikduj/URLColors/
Thanks to @dzoba for developing this with me!
Reviews
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Store average score4.7Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.7Average computed only from synced review bodies below
Reviews with text33Synced review bodies
Total ratings / reviews46Chrome Web Store public rating/review count
Store average score: 4.7. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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It is handy to separate and highlight test system tabs from production. Dead easy to use.
Plain, simple and very very useful regex would be nice 👍
Greet tool! Thank you :)
Simpel und Funktioniert
grateful for this extension.
This is great when working with multiple environments. Tip: you can customize border size/opacity per site, so you can set your prod instance to super visible bright red border to prevent you from making a career-limiting mistake!
Thank you. It helps me a lot.
간단한 기능이지만 편리해요
I've been using URLColors for many years because it's simple and effective.
Great idea, but this NEEDS regex or wildcard matching or (instructions as to how to enable) as it is only good for one url not a domain