Opera 10 beta 3 was released Wednesday for Windows, Mac, and Linux users. With a strong European following, the preview version has been able to keep this popular alternative browser competitive by offering page rendering quality comparable to Google Chrome, while offering a robust list of features.

Opera is touting the stability and performance enhancements in the third beta, but in casual testing it appeared to be have the slowest JavaScript engine when compared with Chrome and Firefox. Opera notched 3237.4ms in the SunSpider JavaScript test, while Firefox completed the test in 1142.4ms and Chrome was more than twice as fast as that, reaching 508.2ms.

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