New mozilla-firefox packages are available for Slackware 14.2 and -current to fix security issues.

Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
patches/packages/mozilla-firefox-60.2.1esr-i686-1_slack14.2.txz: Upgraded.
This release contains security fixes and improvements.
A potentially exploitable crash in TransportSecurityInfo used for SSL
can be triggered by data stored in the local cache in the user profile
directory. This issue is only exploitable in combination with another
vulnerability allowing an attacker to write data into the local cache
or from locally installed malware. This issue also triggers a
non-exploitable startup crash for users switching between the Nightly
and Release versions of Firefox if the same profile is used.
For more information, see:
https://www.mozilla.org/security/known-vulnerabilities/firefoxESR.html
https://www.mozilla.org/en-US/security/advisories/mfsa2018-23/
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12383
(* Security fix *)
+--------------------------+


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

Thanks to the friendly folks at the OSU Open Source Lab
(http://osuosl.org) for donating 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 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/mozilla-firefox-60.2.1esr-i686-1_slack14.2.txz

Updated package for Slackware x86_64 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/mozilla-firefox-60.2.1esr-x86_64-1_slack14.2.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/xap/mozilla-firefox-60.2.1esr-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/xap/mozilla-firefox-60.2.1esr-x86_64-1.txz


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

Slackware 14.2 package:
78eb6398d14511de491425e358670ac1 mozilla-firefox-60.2.1esr-i686-1_slack14.2.txz

Slackware x86_64 14.2 package:
e054cddedab4f816f9d620a82c37161e mozilla-firefox-60.2.1esr-x86_64-1_slack14.2.txz

Slackware -current package:
fab5c7ebb3898e4a1cb6997a62c64793 xap/mozilla-firefox-60.2.1esr-i686-1.txz

Slackware x86_64 -current package:
0a72f509c4ada2b4a298d06d506253c7 xap/mozilla-firefox-60.2.1esr-x86_64-1.txz


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

Upgrade the package as root:
# upgradepkg mozilla-firefox-60.2.1esr-i686-1_slack14.2.txz

  Mozilla-Firefox (SSA:2018-265-01) Update for Slackware