A biggest change to this new release is the inclusion of out-of-process plug-ins. Now, plug-ins is running in a separate process called Out of Process Plugins or OOPP. It gives Opera a level of protection from plug-in instability, which was one of the most common sources of browser crashes and freezes. Moreover, the inclusion of Out of Process Plugins or OOPP means, you can run 32-bit plugins in a 64-bit browser.
Opera 12 has also features full hardware acceleration with WebGL, improved HTML5 and CSS3 support. Now you can run web applications and online games more smoothly and quickly than ever on your Opera. You can read full changelog and more about this release at here. You can download Opera 12 Alpha 64-bit /32bit for Windows, Mac and Linux from here.
