This update for MozillaFirefox fixes the following issues:

-Firefox was updated to 78.3.0 ESR (bsc#1176756, MFSA 2020-43)
- CVE-2020-15677: Download origin spoofing via redirect
- CVE-2020-15676: Fixed an XSS when pasting attacker-controlled data into a
contenteditable element
- CVE-2020-15678: When recursing through layers while scrolling, an iterator
may have become invalid, resulting in a potential use-after-free scenario
- CVE-2020-15673: Fixed memory safety bugs
- Enhance fix for wayland-detection (bsc#1174420)
- Attempt to fix langpack-parallelization by introducing separate
obj-dirs for each lang (bsc#1173986, bsc#1167976)

This update was imported from the SUSE:SLE-15:Update update project.