This update for MozillaFirefox fixes the following issues:

Update to Extended Support Release 91.4.0 (bsc#1193485):

- CVE-2021-43536: URL leakage when navigating while executing asynchronous function
- CVE-2021-43537: Heap buffer overflow when using structured clone
- CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
- CVE-2021-43539: GC rooting failure when calling wasm instance methods
- CVE-2021-43541: External protocol handler parameters were unescaped
- CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
- CVE-2021-43543: Bypass of CSP sandbox directive when embedding
- CVE-2021-43545: Denial of Service when using the Location API in a loop
- CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed
- Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4
- Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)

This update was imported from the SUSE:SLE-15-SP2:Update update project.