Security fix for the ALT Linux 10 package firefox-esr version 78.6.0-alt1

Dec. 14, 2020 Andrey Cherepanov 78.6.0-alt1 - New version 78.6.0. - Fixes: + 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...