/usr/lib/x86_64-linux-gnu/ is in qtwebengine5-dev 5.9.5+dfsg-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/Qt5Designer/
/usr/lib/x86_64-linux-gnu/cmake/Qt5Designer/Qt5Designer_QWebEngineViewPlugin.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngine/
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngine/Qt5WebEngineConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngine/Qt5WebEngineConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngineCore/
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngineCore/Qt5WebEngineCoreConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngineCore/Qt5WebEngineCoreConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngineWidgets/
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngineWidgets/Qt5WebEngineWidgetsConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5WebEngineWidgets/Qt5WebEngineWidgetsConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/libQt5WebEngine.prl
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.prl
/usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.prl
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5WebEngine.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5WebEngineCore.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5WebEngineWidgets.pc
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_webengine.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_webenginecore.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_webenginewidgets.pri
/usr/lib/x86_64-linux-gnu/qt5/plugins/
/usr/lib/x86_64-linux-gnu/qt5/plugins/designer/
/usr/lib/x86_64-linux-gnu/qt5/plugins/designer/libqwebengineview.so
/usr/lib/x86_64-linux-gnu/libQt5WebEngine.so
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so
/usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so