This update for MozillaFirefox fixes the following issues :

Firefox Extended Support Release 78.7.0 ESR (MFSA 2021-04, bsc#1181414)

  - CVE-2021-23953: Fixed a Cross-origin information leakage     via redirected PDF requests

  - CVE-2021-23954: Fixed a type confusion when using     logical assignment operators in JavaScript switch     statements

  - CVE-2020-26976: Fixed an issue where HTTPS pages could     have been intercepted by a registered service worker     when they should not have been

  - CVE-2021-23960: Fixed a use-after-poison for incorrectly     redeclared JavaScript variables during GC

  - CVE-2021-23964: Fixed Memory safety bugs

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:0259-1)

high Nessus Plugin ID 146051

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