nongnu: firefox: Update to 120.0 [security fixes].
Fixes CVE-2023-6204, CVE-2023-6205, CVE-2023-6206, CVE-2023-6207, CVE-2023-6208, CVE-2023-6209, CVE-2023-6210, CVE-2023-6211, CVE-2023-6212, CVE-2023-6213.
- nongnu/packages/mozilla.scm (firefox): Update to 120.0.