C64 Vault EmulatorJS 4.2.3 modification notice

Upstream project: https://github.com/EmulatorJS/EmulatorJS/tree/v4.2.3
Upstream license: GNU General Public License version 3 or later
Modified by: C64 Vault
Modification date: 2026-09-19 UTC

Modification:
The checkForUpdates() method in data/src/emulator.js returns immediately instead of requesting https://cdn.emulatorjs.org/stable/data/version.json.

Reason:
C64 Vault pins and audits the complete EmulatorJS 4.2.3 runtime. The public workbench is designed to make no third-party runtime request and to keep all emulator assets same-origin.

Functional scope:
No emulation, user-media, save-state, rendering, input, or core-selection behavior is changed by this patch.

Complete corresponding source for the modified runtime is published adjacent to the deployed release at:
/source/emulatorjs-v4.2.3-c64vault-patched-source.tar.gz