/usr/lib/libreoffice/share/extensions/canzeley-client/Office/ is in libreoffice-canzeley-client 0.5.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/BaseWindowState.xcu
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/BasicIDEWindowState.xcu
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/CalcWindowState.xcu
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/DrawWindowState.xcu
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/ImpressWindowState.xcu
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/MathWindowState.xcu
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/StartModuleWindowState.xcu
/usr/lib/libreoffice/share/extensions/canzeley-client/Office/UI/WriterWindowState.xcu