Firefox did not reset the address bar after the beforeunload dialog was shown if the user chose to remain on the page. This could have resulted in an incorrect URL being shown when used in conjunction with other unexpected browser behaviors. This vulnerability affects Firefox < 80.
Firefox no restableció la barra de direcciones después de que se mostrara el cuadro de diálogo beforeunload se mostrara si el usuario eligiera permanecer en la página. Esto podría haber resultado en que una URL incorrecta sea mostrada cuando se usaba en conjunto con otros comportamientos inesperados del navegador. Esta vulnerabilidad afecta a Firefox versiones anteriores a 80
USN-4474-1 fixed vulnerabilities in Firefox. The update introduced various minor regressions. This update fixes the problem. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, trick the user in to installing a malicious extension, spoof the URL bar, leak sensitive information between origins, or execute arbitrary code. It was discovered that NSS incorrectly handled certain signatures. An attacker could possibly use this issue to expose sensitive information. A data race was discovered when importing certificate information in to the trust store. An attacker could potentially exploit this to cause an unspecified impact. Various other issues were also addressed.
