User Agent Switcher

A user agent is a client application most commonly used to access the World Wide Web. Web user agents range from web browsers and e-mail clients to search engine crawlers (“spiders”), as well as mobile phones, screen readers and braille browsers.

If you do web development or cannot access a page because it asks for a certain user agent you might want to test how a site reacts to a user agent string other than which your default browser sends a little add-on called User Agent Switcher comes in handy.

User Agent Switcher addon for Mozilla is famous of all.

Click here to download the addon. After installing the plugin goto

Tools->Default user Agent  and select the user agent you like