Put yourself in the picture: With Opera 12, your favorite sites can use your computer's webcam to take photos from the browser. Set a new profile picture in your social network or just see what you look like with a moustache!
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.
Themes: New, lightweight themes make it easier to customize the browser. Install or change themes at the click of a button, without restarting the browser.
Address Field Enhancements: Improved address field and address bar drop-down suggestions. Smart URL shortening in the address field drop-down. The page title and the page excerpt will be used for full page search results. URL and page content columns in the address field drop-down have been combined.
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.
Right-to-Left (RTL) script support added, 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.
Opera Unite and Opera Widgets will be off by default in Opera 12.00, and will eventually be phased out of the Opera browser in the future. Voice support will be removed as of Opera 12.00, as the voice-detection library is no longer supported by the third-party vendor.