This update for MozillaFirefox fixes the following issues: Security issues fixed: - Update to Mozilla Firefox 60.3.0esr: MFSA 2018-27 - CVE-2018-12392: Crash with nested event loops. - CVE-2018-12393: Integer overflow during Unicode conversion while loading JavaScript. - CVE-2018-12395: WebExtension bypass of domain restrictions through header rewriting. - CVE-2018-12396: WebExtension content scripts can execute in disallowed contexts. - CVE-2018-12397: WebExtension local file access vulnerability. - CVE-2018-12389: Memory safety bugs fixed in Firefox ESR 60.3. - CVE-2018-12390: Memory safety bugs fixed in Firefox 63 and Firefox ESR 60.3.