Custom UserAgent String is a free Chrome extension developed by Grephy that allows you to add a custom user-agent string for specific URLs or domains. With this extension, you can easily change your browser's user-agent by adding site-specific user-agent strings from the Options page.

One of the main features of Custom UserAgent String is the ability to add a custom user-agent string for each URL or website (domain). This allows you to have different user-agent strings for different websites, giving you more control over your browsing experience. Additionally, there is an option to change each URL to a domain directly from the options page, making it even more convenient to manage your user-agent strings.

The toolbar popup of Custom UserAgent String features an ON or OFF switch button on the left side, allowing you to quickly enable or disable the extension as needed. The options page also provides a collection of more than 100 sample user-agent strings that you can use. These sample user-agent strings cover a wide range of modern browsers and platforms, both desktop and mobile.

Managing your user-agent strings is easy with Custom UserAgent String. For each user-agent string, you can choose to either delete it or disable it for future use. If you need to find a user-agent string, you can either search for one using a search engine or refer to the sample list provided on the extension's options page. This list includes more than 100 user-agent strings, making it easy to find the right one for your needs.

Custom UserAgent String is a useful Chrome extension for anyone who needs to customize their browser's user-agent for specific websites or domains. With its easy-to-use interface and extensive list of user-agent strings, it provides a convenient way to enhance your browsing experience.