We have several environments of our web application, e.g. Development, QA and Production. One of the frequent and risky mistakes that people do is changing the configuration in the wrong environment.

Is there any Chrome plugin where I can configure the URL of the environment so that one can distinguish config tool pages by some prominent change, i.e. colour of header etc.?

For example when I am in the Production environment, the header becomes red, otherwise green in dev. So that I know I have to be extra careful when it's red.

6 Answers 6


Is URLColors perhaps the extension you're looking for? https://chrome.google.com/webstore/detail/urlcolors/jjccpcminoppplpmcfghflolejbdkekm

This is no longer working as it turned out it had malware

UPDATE 2022-08-17: it is in chrome store again without malware flags

  • The author had made the fix and it will be available in couple of weeks. But if you can't wait, you just need to toggle it on by going into the extensions and it will work. Commented Jul 11, 2022 at 2:10

I love the Tab Modifier Chrome extension as I am a Salesforce Admin and work in variety of different sandboxes at the same time so without this amazing tool its very easy to make the wrong change in the wrong environment.


  • Welcome, you are required to declare your affiliation to it, if any. Commented Jun 6, 2023 at 22:34
  • I am a Salesforce expert - I hope this adresses your comment? Commented Jun 7, 2023 at 23:39
  • Generally speaking, on this site, it's best to declare your affiliation to products and external links, even if you are not associated with them. :-) Commented Jun 12, 2023 at 2:54

It is amazing to me that you would ask this question because 6 months ago I set out to build this extension (I was going to name it Tempeh) after finding no viable alternative.

What I found 6 months ago was that there is no Chrome extension that behaved as you outlined. When I decided to develop it I found a few things

  1. The "URL" bar in chrome is called the OmniBox and there is an extension API that lets you interact with it
  2. Currently there is no way to change the color of the OmniBox.

After some very extensive searching I found a form post that stated there was an API call which let you change the color of the OmniBox. The post also mentioned the release number that removed this functionality (I don't have it - it was not a major release).

So to answer you question directly - there is no extension that acts exactly in the manner you want because it's not allowed via the API. Furthermore I have not found an extension that uses some other type of notification, and I abandoned the project because I am not a front end developer and all the "notification" actions I wrote (change background color, put a thin border around viewport, etc) turned out to be ugly and disheartening (changing the omnibox color is much more elegant IMO).

If however you are up to the challenge I can now think of a decent way to implement this. I would probably implement a tab in devtools using the devtools api that let the user (a developer) set websites into categories and assigned color to. Then when one of those pages is visited you notify the developer somehow....



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Easy to use and allows you to specify URL groups by regular expression or by wild card.

It is pure CSS and always overrides site styles so you don't have to wonder if it is working. Super simple.

Downside maybe: It works on the client, thus the user would have to have it enabled and configured correctly, though it's easy enough to export and import styles.


Why expect Chrome to do it for you and what about when you are testing for other browsers, you do test for other browsers hopefully, when you can provide this yourselves with very little effort? Browser plug-in facilities are mostly to provide web functionality to those that can't change the sites.


If you have an automatic deployment mechanism, such as deployment through Jenkins or git, you could have the background colour of the whole config page automatically changed in colour depending on the phase deployed to.

Also Simple:

Make the background colour for the settings page, on each sever or in each environment, be a colour loaded from a css pages that is not a part of the deployed application but is present, but different, on the Test & QA servers to the production server.

Nearly As Simple

On the settings page include a little JavaScript to change background or add watermark or warning.

function setColourBasedOnServer(){
    if(document.URL.indexOf("TestServer") >= 0){ // Use some string unique to test
        document.body.style.background = 'green';
    if (document.URL.indexOf("QAServer") >= 0){ // Use some string unique to QA
        document.body.style.background = 'amber';
    else {  // NOT Test or QA
         document.body.style.background = 'white'; // Or some sensible default colour

And invoke it:

<BODY onload="setColourBasedOnServer();">
  • Yes we have done it this way for custom pages. I am now dealing with Google cloud console which we do not have control over but the project name (env name) is always in the url. I want to change something significant in the page if its production project. Otherwise we have been accidenally doing changes.
    – Neil
    Commented Mar 4, 2017 at 9:56
  • @SoulMan Have you thought of putting the cloud console inside a frame/div on a custom page? Commented Mar 4, 2017 at 10:27

I have been using Tempermonkey for exactly this use case. I don't have the code at hand, but it was pretty straightforward. Just write a script to prepend a navbar to the page and based on the URL that is loaded change color etc. I also added buttons to open the same page on different stages to compare.

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