The Environment Marker is an extension for Chrome that allows you to flag websites by adding a colored label depending on the URL configuration. It can be used as an environment for websites. Each URL can have a color and a label, and you can select the color for all the URLs or assign a different one to each one.

You can also set it as a regular expression (including wildcards), and you can apply the color to any website using this extension. You can select which color you want and which environment you want to assign it to, and you can choose the label color and the label alignment.

There are options to apply it to the home screen or make it run automatically in the browser. It also has options to show the icon in the address bar or the panel, change the menu's color and the background, and add a shortcut.