Updated: Opera Releases New 12.00 Pre Alpha Build

By | September 14, 2011 | 20 Comments


Opera Releases New 12.00 Pre Alpha BuildBeats Internet Explorer 10 Platform Preview 2 in the Test262 test suite, fails against PP3.

Continuing the development of Opera 12, Norwegian browser maker has recently released a new build which features a full ECMAScript (JavaScript) 5.1 support and few other goodies.

According to Wikipedia, Opera 12.00 pre-alpha (build 1065) fails only at 5 out of 10978 tests which is slightly better than IE10 PP2 as it scored 7/10935.

As for other web browsers, Firefox 9.0a1 failed scored 168/10978 tests while Google Chrome 15.0.874.12 failed at 413 out of 10978 tests.

In case you are using Windows 8 Developer Preview with IE10 Platform Preview 3, feel free to run this test and let us know the results.

For a complete list of changes and download links, visit the following page.

Update: Internet Explorer 10 Platform Preview 3 beats Opera with only 3 failures.

[Thanks, IE & Opera FanBoy]


About (Author Profile)


Vygantas is a former web designer whose projects are used by companies such as AMD, NVIDIA and departed Westood Studios. Being passionate about software, Vygantas began his journalism career back in 2007 when he founded FavBrowser.com. Having said that, he is also an adrenaline junkie who enjoys good books, fitness activities and Forex trading.

Comments (20)

Trackback URL | Comments RSS Feed

  1. Shane Bundy says:

    Only getting 1 fail on the test. Wikipedia can be wrong (like the time Chrome got 97 instead of the actual 100 score it got on Acid3).

    Speaking of Windows 8 WP reckons it’s based on the Linux kernel. Any proof?

  2. IE & Opera FanBoy says:

    IE 10 PP3 has only 3 failures!!

  3. Mikah says:

    1 fail or 5 fails even a couple of hundred fails don’t mean too much but Opera’s previous score 3865 failures was very poor , quite a turnaround

  4. Anonymous says:

    This is great news. Opera 12 is looking more promising with every new pre-release build!

  5. FreddyH says:

    IE10 PP3 fail:
    S15.2.4.4_A14  Checking Object.prototype.valueOf invoked by the ‘call’ property.
    10.4.3-1-8-s      Strict Mode – checking ‘this’ (FunctionDeclaration includes strict directive prologue)
    10.4.3-1-8-gs    Strict – checking ‘this’ from a global scope (FunctionDeclaration incluedes strict directive prologue)

Leave a Reply