/usr/lib/ is in qml-module-qtwebengine 5.9.5+dfsg-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/qml/
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/AlertDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/AuthenticationDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/ColorDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/ConfirmDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/FilePicker.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/Menu.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/MenuItem.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/MenuSeparator.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/MessageBubble.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/libqtwebengineplugin.so
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/PromptDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/ToolTip.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls1Delegates/qmldir
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/AlertDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/AuthenticationDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/ConfirmDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/Menu.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/MenuItem.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/MenuSeparator.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/PromptDialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/ToolTip.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/information.png
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/qmldir
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/Controls2Delegates/question.png
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/plugins.qmltypes
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/qmldir
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/testsupport/
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/testsupport/libqtwebenginetestsupportplugin.so
/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/testsupport/qmldir