CVE ID:	CVE-2023-4583
Description:	When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2023-4583 https://bugzilla.mozilla.org/show_bug.cgi?id=1842030 https://bugzilla.mozilla.org/show_bug.cgi?id=1842030 https://www.mozilla.org/security/advisories/mfsa2023-34/ https://www.mozilla.org/security/advisories/mfsa2023-34/ https://www.mozilla.org/security/advisories/mfsa2023-36/ https://www.mozilla.org/security/advisories/mfsa2023-36/ https://www.mozilla.org/security/advisories/mfsa2023-38/ https://www.mozilla.org/security/advisories/mfsa2023-38/