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Firefox 16 just hit the market a couple of days ago, and Mozilla has been forced to pull down the latest version due to a vulnerability. This security threat not only caused Mozilla to take down the latest version, but they are actually encouraging users who have already upgraded to download Firefox 15 and install it on their computer until further notice.

Firefox says that this vulnerability “could allow a malicious site to potentially determine which websites users have visited and have access to the URL or URL parameters.” That being said, Firefox is not aware of any cases of this exploit being used in the wild, but now that the security threat has been made public, it would not surprise anyone to see malicious individuals start taking advantage of it.

To downgrade, users need to go to this page and download the old version of Firefox. There is no reason to take the risk with version 16, so users are advised to install the old version until Firefox is able to issue an update for version 16.

Mozilla says it should have a safe version of Firefox 16 out within the next day or two, so users should be able to get the new features of the browser soon enough. For the time being, do not download version 16 and if you already have downloaded it, take a few seconds to revert your browser to the old, safe version.

As of this writing, Firefox has already issued a safe version of its Android browser, so the desktop version should not be far behind.

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Source: VentureBeat

  1. CZ
    October 14, 2012 at 3:38 am

    One problem... the link for "this page" takes me to the new 16.0.1 browser that I installed 2 days ago, nowhere there do I see a link for the older Firefox 15.

  2. Ron Payne
    October 13, 2012 at 8:53 am

    The link in "To downgrade, users need to go to this page and download the old version of Firefox" goes to version 16.01. Version 15 is here:

    http://support.mozilla.org/en-US/kb/install-older-version-of-firefox?esab=a&s=old+versions&r=1&as=s#os=win&browser=fx16

    Ron

  3. Joe W.
    October 12, 2012 at 8:49 pm

    yup appears to be taken care of already.

  4. Besian Cato
    October 12, 2012 at 8:14 pm

    they already solved the vulnerability issue with 16.0.1

  5. Alex Perkins
    October 12, 2012 at 5:45 pm

    Good job I use Chrome.

  6. Sam Kar
    October 12, 2012 at 4:35 pm

    Mozilla updated very fast- before this article was even posted.

  7. Ashwin Ramesh
    October 12, 2012 at 2:53 pm

    How about Mozilla's e-mail client, Thunderbird? I have the latest one, v16.0.1 installed. Should I downgrade to the previous version?

  8. Harish Jonnalagadda
    October 12, 2012 at 12:08 pm

    Yet another reason to switch to Chrome..

  9. holeykow
    October 12, 2012 at 4:32 am

    ive been using palemoon for a lil bit and i like it alot. its like a faster version of firefox with minimal options taken out. the addons that i had on firefox work flawlessly with palemoon. i found it by doing a random search on a firefox issue.
    im still new with it, but havent had any issues yet. so far so good.

    i suggest giving it a try.

  10. Mike
    October 12, 2012 at 12:00 am

    Im glad i didnt update yet hope mozilla corrects this problem for good

  11. Mike
    October 11, 2012 at 11:59 pm
  12. James Marshall
    October 11, 2012 at 9:13 pm

    The updated desktop version, 16.0.1, is already available. I updated my copy a few hours ago from About Firefox in the browser. I read that it was rolling out though, so it could take more time for it to become available to some users. If you check and don't see it available, you could just wait for it (it should come soon) or look on Mozilla's FTP servers -- I read that it's posted there as well. I hope this helps.

    • William Smaling
      October 13, 2012 at 9:16 pm

      Yup got it too, Mozilla is pretty quick with the fixes as usual ...

    • Lisa Santika Onggrid
      October 14, 2012 at 11:12 am

      I'm glad I didn't upgrade as soon as it was released. Yeah, it was a quick fix, but I wnder how a fatally faulty release got out at the first place.

  13. Richard Steven Hack
    October 11, 2012 at 9:13 pm

    These days at Mozilla, "QA" means "Quit Asking for quality"...

  14. Scutterman
    October 11, 2012 at 9:09 pm

    When I read this I checked the latest version. 16.0.1 is out and fixes this vulnerability.

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