Pullup ticket #6396 - requested by nia
www/firefox78: security fix

Revisions pulled up:
- www/firefox78/Makefile                                        1.17
- www/firefox78/distinfo                                        1.9
- www/firefox78/patches/patch-dom_webgpu_ipc_WebGPUParent.cpp  deleted

---
  Module Name: pkgsrc
  Committed By: ryoon
  Date: Fri Jan  8 19:13:53 UTC 2021

  Modified Files:
  pkgsrc/www/firefox78: Makefile distinfo
  Removed Files:
  pkgsrc/www/firefox78/patches: patch-dom_webgpu_ipc_WebGPUParent.cpp

  Log Message:
  firefox78: Update to 78.6.1

  Changelog:
  * Fix: Fixed a crash during video playback on Apple Silicon devices (bug 1683579)
  * Secrity fix:
  #CVE-2020-16044: Use-after-free write when handling a malicious COOKIE-ECHO SCTP chunk

(bsiegert)