Opera 12.10 Changelog

Release date: 2012-11-06

Opera 12.10 is a recommended upgrade offering new and improved features, plus security and stability enhancements.

New Features and Important Notes

Operating system compatibility: Windows 8 and Mac OSX

We have added basic touch support for Opera in Windows 8 Classic, so you will be able to scroll, zoom and browse pages and elements easily. As an extra bonus, touch support also works on Windows 7.
Meanwhile, our Mac users will enjoy using the new capabilities of OSX Mountain Lion with Opera. You are now able to use Mountain Lion's built-in share function, using the new Share button in Opera’s address bar, as well as seeing Opera notifications in the Notifications Center.

Extensions, improved

Several new and improved APIs are included in this version of Opera including:

High-resolution Display Support

Improved support for all high-resolution displays, including Apple's new Retina Displays is included in this release.

Web Specifications Support

Opera 12.10 will include changes in the Opera Presto 2.12 engine up to core-integration-point 388.
Support for the SPDY ("Speedy") network standard is included in Opera 12.10. SPDY was designed to cut down the time it takes for a webpage to load, while reducing some of the security risks posed by HTTP.
CSS3 Gradients, Transitions, Animations, and Transforms
All members of these specifications are now available without the -o- prefix and have been updated to the latest published versions.
CSS Site Compatibility
To improve site compatibility and interoperability, Opera 12.10 also introduces aliasing for a selection of vendor-prefixed CSS properties.
  • See our blog post to find out more about which prefixed and unprefixed CSS properties are supported
Fullscreen API
Fullscreen API support has been implemented and fully supports Draft 7 of the Fullscreen API specification
Page Visibility API
Basic support for the Page Visibility API specification has been added, including support for visible and hidden
Support for WebSockets has been updated in Opera 12.10 and is now enabled by default.
ICC Profiles
International Color Consortium profile support has been added, ensuring images look as the author intended

Improvements since Opera 12.10 beta

Network and Site-Specific

  • IPv6 support enhanced: RFC-3484 and RFC-6555 ("Happy Eyeballs") implemented

Fixes and Changes since Opera 12.10 beta

For a complete list of bug fixes for this version, please see the full bug fixes list.

General and User Interface

  • Internet shortcuts are no longer followed when loaded from inline content; see our advisory


  • Fixed an issue that could cause Opera not to correctly check for certificate revocation; see our advisory
  • Fixed an issue where CORS requests could incorrectly retrieve contents of cross origin pages; see our advisory
  • Fixed an issue where data URIs could be used to facilitate Cross-Site Scripting; see our advisory
  • Fixed an issue where cross domain access to object constructors could be used to facilitate cross-site scripting, as reported by Gareth Heyes; see our advisory
  • Fixed an issue where specially crafted SVG images could allow execution of arbitrary code, as reported by Attila Suszter; see our advisory
  • Fixed an issue where specially crafted WebP images could be used to disclose random chunks of memory, as reported by the Google Security Group; see our advisory


Opera Help

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