This update for MozillaFirefox fixes the following issues: Update to Extended Support Release 91.4.0 : - 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 ins ...