"The vulnerability could allow a malicious site to potentially determine which websites users have visited and have access to the URL or URL parameters"<p>"Firefox 16 itself fixed 14 vulnerabilities in version 15, including 11 that could allow attackers to install software without any user interaction beyond normal browsing."<p>Sounds like 16 is still less dangerous than the older version. Why are they telling people to downgrade?<p><a href="http://arstechnica.com/security/2012/10/mozilla-pulls-day-old-firefox-16-from-download-site-over-security-risk/" rel="nofollow">http://arstechnica.com/security/2012/10/mozilla-pulls-day-ol...</a><p><a href="http://www.mozilla.org/security/known-vulnerabilities/firefox.html" rel="nofollow">http://www.mozilla.org/security/known-vulnerabilities/firefo...</a>