UrlRegexBar от wtech

This extension allows you to set specific colors for different URLs, making it intuitive to identify which site you are currently viewing.

Key Features:
Regex-based Matching: Flexible URL specification is supported, such as localhost or ..staging...

Visual Alerts: Displays a thin color bar at the very top of the page. It remains visible even while scrolling, ensuring you are always aware of your current environment.

Multiple Configurations: Easily set and toggle multiple rules—for example, "Blue" for development and "Red" for production environments.

Use Cases:
Prevent Accidental Data Operations: Avoid critical mistakes like unintended deletions or updates in a production environment.

Project Identification: Quickly distinguish between sites when working on multiple projects simultaneously.