CVE-2024-8382 is a vulnerability in Firefox browsers prior to version 130 and Firefox ESR prior to 128.2 and 115.15, where internal browser event interfaces were exposed to web content during privileged EventHandler listener callbacks. Although web content could not use these interfaces with elevated privileges, their presence could reveal certain browser features usage, such as when the Dev Tools console was opened. This information disclosure vulnerability has been assigned a high severity rating with a CVSS score of 8.8. Mozilla has fixed this issue in Firefox 130 and Firefox ESR 128.2.