Opera

Finding out whether someone is using Opera to view a Web page is called "Browser name sniffing". Scripts can determine which browser is used and can then provide different content to them.

This is useful to detect browser features, APIs, and possibly to work around known bugs.

To find out more about browser sniffing and capability detection, see the following articles:

• Opera User Agent/ID Strings
• Using capability detection on Dev Opera, our developer community resource site.