/usr/ is in webapp-container 0.23+16.04.20160413-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/bin/
/usr/bin/webapp-container
/usr/bin/webapp-container-hook
/usr/share/
/usr/share/click/
/usr/share/click/hooks/
/usr/share/click/hooks/webapp-container.hook
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/webapp-container
/usr/share/doc/
/usr/share/doc/webapp-container/
/usr/share/doc/webapp-container/copyright
/usr/share/webbrowser-app/
/usr/share/webbrowser-app/webcontainer/
/usr/share/webbrowser-app/webcontainer/AccountsLogic.qml
/usr/share/webbrowser-app/webcontainer/AccountsSplashScreen.qml
/usr/share/webbrowser-app/webcontainer/Chrome.qml
/usr/share/webbrowser-app/webcontainer/SplashScreen.qml
/usr/share/webbrowser-app/webcontainer/AccountsPage.qml
/usr/share/webbrowser-app/webcontainer/PopupWindowController.qml
/usr/share/webbrowser-app/webcontainer/WebappContainerWebview.qml
/usr/share/webbrowser-app/webcontainer/WebApp.qml
/usr/share/webbrowser-app/webcontainer/AccountItem.qml
/usr/share/webbrowser-app/webcontainer/ContextMenuWide.qml
/usr/share/webbrowser-app/webcontainer/webapp-container.qml
/usr/share/webbrowser-app/webcontainer/WebViewImplOxide.qml
/usr/share/webbrowser-app/webcontainer/ContextMenuMobile.qml
/usr/share/webbrowser-app/webcontainer/PopupWindowOverlay.qml
/usr/share/webbrowser-app/webcontainer/AccountErrorScreen.qml
/usr/share/webbrowser-app/webcontainer/WebappWebview.qml
/usr/share/webbrowser-app/webcontainer/ContentPickerDialog.qml
/usr/share/webbrowser-app/webcontainer/webapp-specific-page-metadata-collector.js
/usr/share/webbrowser-app/webcontainer/OnlineAccountsController.qml
/usr/share/webbrowser-app/webcontainer/assets/
/usr/share/webbrowser-app/webcontainer/assets/tab-error@27.png
/usr/share/webbrowser-app/webcontainer/ContentDownloadDialog.qml
/usr/share/webbrowser-app/webcontainer/ColorUtils.js
/usr/share/webbrowser-app/webcontainer/SadPage.qml
/usr/share/webbrowser-app/webcontainer/AccountChooserDialog.qml
/usr/share/doc/webapp-container/changelog.Debian.gz