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WebLabeler is a lightweight browser extension for developers, QA engineers, and content managers who work with multiple environments every day. It adds clear, customizable visual labels to web pages and browser tabs, making it easy to distinguish between development, testing, staging, and production environments.

You can fully customize label styles (shape, color, position, opacity) and enable favicon badging for instant recognition in the tab bar. Labels can be applied automatically using flexible domain-based rules. A quick-access popup allows you to toggle labels on or off at any time.

WebLabeler also supports exporting and importing configurations, easy migration from other tools, optional dark mode, and synchronization across devices. The extension is designed to reduce mistakes, improve focus, and keep your workflow organized.