Summary
The remote host is missing an update as announced
via advisory SSA:2006-045-02.
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2006-045-02
Insight
New Firefox packages are available for Slackware 10.2 and -current to fix security issues.
More details about the issues may be found here:
http://www.mozilla.org/projects/security/known-vulnerabilities.html#firefox1.5.0.1