src/vs/platform/update/electron-main/updateService.linux.ts/LinuxUpdateService/doDownloadUpdate
class LinuxUpdateService:	protected override async doDownloadUpdate(state: AvailableForDownload): Promise<void> {
		// Use the download URL if available as we don't currently detect the package type that was
		// installed and the website download page is more useful than the tarball generally.
		if (this.productService.downloadUrl && this.productService.downloadUrl.length > 0) {
			this.nativeHostMainService.openExternal(undefined, this.productService.downloadUrl);
		} else if (state.update.url) {
			this.nativeHostMainService.openExternal(undefined, state.update.url);
		}

		this.setState(State.Idle(UpdateType.Archive));
	}