6.5. Opera

• A cross-platform Qt-based browser.
• Aims to be very fast and lightweight.
• Commercial. Distributed as binaries for most common platforms. (Ad-ware or pay)
• Support for some W3C standards (or parts of them) is not present. They may or may not be added in the future.
• Very small marketshare. (sort of falls between the chairs of OS-shipped browsers and the open-source Mozilla).

Verdict

Test with it, if you can (and you probably can). Other than that, it's not a very important browser. (at least not todate)