New mozilla-firefox packages are available for Slackware 10.2, 11.0, 12.0, and -current to fix security issues.

Here are the details from the Slackware 12.0 ChangeLog:
+--------------------------+
patches/packages/mozilla-firefox-2.0.0.10-i686-1.tgz:
Upgraded to firefox-2.0.0.10.
This upgrade fixes some more security bugs.
For more information, see:
http://www.mozilla.org/projects/security/known-vulnerabilities.html#firefox
(* Security fix *)
+--------------------------+


Where to find the new packages:
+-----------------------------+

HINT: Getting slow download speeds from ftp.slackware.com?
Give slackware.osuosl.org a try. This is another primary FTP site
for Slackware that can be considerably faster than downloading
directly from ftp.slackware.com.

Thanks to the friendly folks at the OSU Open Source Lab
(http://osuosl.org) for donating additional FTP and rsync hosting
to the Slackware project! :-)

Also see the "Get Slack" section on http://slackware.com for
additional mirror sites near you.

Updated package for Slackware 10.2:
ftp://ftp.slackware.com/pub/slackware/slackware-10.2/patches/packages/mozilla-firefox-2.0.0.10-i686-1.tgz

Updated package for Slackware 11.0:
ftp://ftp.slackware.com/pub/slackware/slackware-11.0/patches/packages/mozilla-firefox-2.0.0.10-i686-1.tgz

Updated package for Slackware 12.0:
ftp://ftp.slackware.com/pub/slackware/slackware-12.0/patches/packages/mozilla-firefox-2.0.0.10-i686-1.tgz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/xap/mozilla-firefox-2.0.0.10-i686-1.tgz


MD5 signatures:
+-------------+

Slackware 10.2 package:
cd96366d29238678c2ebeb08ed2be905 mozilla-firefox-2.0.0.10-i686-1.tgz

Slackware 11.0 package:
cd96366d29238678c2ebeb08ed2be905 mozilla-firefox-2.0.0.10-i686-1.tgz

Slackware 12.0 package:
cd96366d29238678c2ebeb08ed2be905 mozilla-firefox-2.0.0.10-i686-1.tgz

Slackware -current package:
cd96366d29238678c2ebeb08ed2be905 mozilla-firefox-2.0.0.10-i686-1.tgz


Installation instructions:
+------------------------+

Upgrade the package as root:
# upgradepkg mozilla-firefox-2.0.0.10-i686-1.tgz


+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key