AgentSwitch is a versatile Chrome add-on designed for users who require custom user-agent strings for various websites. This tool allows web developers and power users to set specific user-agent strings directly from a user-friendly options page. With AgentSwitch, users can easily switch between different browsers and devices, ensuring optimal site rendering and compatibility testing. The add-on includes preset user-agents for popular browsers like Chrome, Firefox, Safari, and Edge, as well as mobile devices, making it a comprehensive solution for testing purposes.

One of the key features of AgentSwitch is its ability to function entirely offline, eliminating the need for external connections. Users can manage an unlimited number of domain rules with simple enable and disable toggles, offering precise control over browser identification. This makes AgentSwitch an essential tool for developers looking to enhance their workflow and ensure their websites perform well across different platforms.