[RHSA-2020:5561] firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 78.6.0 ESR.

Security Fix(es):

• chromium-browser: Uninitialized Use in V8 (CVE-2020-16042)

• Mozilla: Heap buffer overflow in WebGL (CVE-2020-26971)

• Mozilla: CSS Sanitizer performed incorrect sanitization (CVE-2020-26973)

• Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free (CVE-2020-26974)

• Mozilla: Memory safety bugs fixed in Firefox 84 and Firefox ESR 78.6 (CVE-2020-35113)

• Mozilla: Internal network hosts could have been probed by a malicious webpage (CVE-2020-26978)

• Mozilla: The proxy.onRequest API did not catch view-source URLs (CVE-2020-35111)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.