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<!DOCTYPE html>
<script>
window.parent.postMessage({
isSecureContext,
hasInstall: 'install' in navigator,
installType: typeof navigator.install,
}, '*');
</script>
<!DOCTYPE html>
<script>
window.parent.postMessage({
isSecureContext,
hasInstall: 'install' in navigator,
installType: typeof navigator.install,
}, '*');
</script>