Opera 12.12 final has been released

Martin Brinkmann
Dec 18, 2012

Opera users take note, a new version of your beloved browser has been released bringing the stable release channel version of the Internet browser to 12.12. Opera 12.12 is a recommended stability and security update for the browser that all Opera 12.11 and earlier users should install as soon as possible to protect their browser from exploits targeting the security vulnerabilities.

You are probably wondering what's new in Opera 12.12. Here is a quick rundown of the changes found in the release:

The Delete Private Data dialog (under Opera > Settings > Delete Private Data) has a new setting. Delete settings and data for all extensions is turned off by default and you need to check it to include it in the deletion process.

delete settings and data for extensions

When you check the feature you are telling Opera to delete all data that extensions have generated since their installation. While I can't verify it 100%, it also appears as if all settings of all extensions are reset to their default values by this operation so use this with caution as you may delete all of your custom configurations this way. Please note that this will include disabled extensions and not only extensions that are enabled in the browser.

Two additional fixes affect the Delete Private Data dialog. The first fixed a serious issue where the feature could delete extensions and settings data which for obvious reasons should not have happened as earlier versions of Opera did not include that feature. The second is a redesign of the Delete Private Data dialog window so that it is better usable on smaller screens.

The developers in addition have made several general stability improvements and fixes in the new version that they do not mention individually.

As far as security goes, the following vulnerabilities have been fixed in Opera 12.12:

  • Fixed an issue where malformed GIF images could allow execution of arbitrary code
  • Fixed an issue where private data could be disclosed to other computer users, or be modified by them
  • Fixed an issue where repeated attempts to access a target site could trigger address field spoofing

Opera 12.12 is already available for download at the official Opera website. You can check for updates from within the browser with a click on Opera > Help > Check for updates.



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  1. Thomas said on December 18, 2012 at 9:57 pm

    Ja, it is a minor update this time. No performance updates unfortunately. I can’t imagine running Opera withoud SSD. It simply takes way too much time to fire up on traditional HDD. And there have been visual bugs and website incompatibilities in every update I can remember of.

    Anyway huge performance improvements can’t be gained just by creating efficient java script engine etc. Longest browsing delays happen with DNS inquiry. Sadly, nothing much can be done here.

    I am dreaming of Internet, responsive like Windows explorer when navigating among folders ;)

    Regarding the Opera security. It is a good idea to use app EMET created by Microsoft and implement its features with Opera (and other programs that connect to the web too). EMET will protect Opera against current exploits and drive-by downloads which is a major reason, why computer gets infected. A-must security tool for a security-geeks. There is a alternative for EMET too. ExploitShield (beta) works in similar way.

    1. Martin Brinkmann said on December 18, 2012 at 11:16 pm

      I run both EMET and ExploitShield on my main PC, great combo.

  2. Nebulus said on December 18, 2012 at 9:14 pm

    I managed to install it now, and it works pretty well (no crashes). But what I said about the cookie manager/engine is still true in Opera 12.12, even after numerous bug reports I filled for the older versions…

  3. Nkhuwa Satulino said on December 18, 2012 at 7:42 pm

    I need update

  4. Matias Aquino said on December 18, 2012 at 2:51 pm

    Despite Opera being my favorite browser, I´ve not updated since 12.02, because it just crashes too much after that version. Hope this time they fixed it!

  5. imu said on December 18, 2012 at 2:06 pm

    Hi Martin, if you know how to play Vimeo videos inside latest VLC share it please :)

    hope you forgive me spam.

  6. Maou said on December 18, 2012 at 1:57 pm

    I always got that damn installer error, aside that it works fine.
    Thanks Martin.

  7. Nebulus said on December 18, 2012 at 1:10 pm

    I will try it later today, but I gave up hope that they will fix the cookies engine a loooong time ago. This is the main reason that I don’t use Opera as my main browser.

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