Opera 12.00 Beta for Windows Changelog

Release date: April 26, 2012

This is a beta version of Opera. It incorporates new features, improvements, and stability adjustments.

Please use this Opera beta only on properly backed up computers.

New Features and Important Notes

Out-of-Process Plug-ins

Opera now runs plug-ins as a separate process, allowing for more control when a plug-in misbehaves. This feature will enhance security and stability.

64-Bit Mac and Windows Versions

The 64-bit version of Opera will offer performance improvements for some functions and allow Opera more freedom in allocating memory.


The new Opera skinning system will allow background image, colorization, and which parts of the UI are shown to be modified.

Address Field Enhancements

Numerous improvements to the address bar have been made:

Experimental Full Hardware Acceleration

Hardware acceleration allows Opera to offload graphics rendering from the processor (CPU) to the graphics card (GPU), making graphics intensive operations such as animations faster.

Opera Unite, Opera Widgets, and Opera Voice Discontinuation

Unite, Widgets, and Voice will be off by default in 12.00 beta, and will eventually be phased out of the Opera browser in the future.

Right-to-Left (RTL) Script Support Added, Language Support Expanded

RTL support will bring additional stability for certain languages. Persian, Urdu, Hebrew, and Arabic languages added.

Window and Tabs API

Extensions will now be able to interact with tabs, create tab groups, and manage windows.

Web Specifications Support

Opera 12.00 beta will include changes in the Opera Presto 2.10 engine up to core-integration-point 289.

Initial support for real-time communication has been added. Allowing the source of HTML5 <video> to be set to the user's webcam.
HTML5 Drag and Drop
Drag and drop enables webpages to have elements that the user can drag from one page to another, or from their desktop to the webpage.
CSS3 Animations and Transitions
Support for animations and transitions has been updated and expanded.
Do Not Track
Added support for the Do Not Track (DNT) HTTP header.
Paged Overflow
An innovative new set of CSS constructs that allow webpages to be split up into paged media, revolutionizing the Web reading experience.


General and User interface

Display and Scripting

Mail, News, Chat


General and User interface

Display and Scripting

Mail, News, Chat

Network and Site-Specific


Opera Help

Need help? Hit F1 anytime while using Opera to access our online help files, or go here.