This update for MozillaFirefox fixes the following issues: - Firefox Extended Support Release 78.6.0 ESR * Fixed: Various stability, functionality, and security fixes MFSA 2020-55 * CVE-2020-16042 Operations on a BigInt could have caused uninitialized memory to be exposed * CVE-2020-26971 Heap buffer overflow in WebGL * CVE-2020-26973 CSS Sanitizer performed incorrect sanitization * CVE-2020-26974 Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free * CVE-2020-26978 Internal network hosts could have been probed by a malicious webpage * CVE-2020-35111 The proxy.onRequest API did not catch view-source URLs * CVE-2020-35112 Opening an extension-less download may have inadvertently launched an executable instead * CVE-2020-35113 Memory safety bugs fixed in Firefox 84 and Firefox ESR 78.6