/usr/share/ is in xul-ext-gnome-keyring 0.10-1~deb8u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xul-ext/
/usr/share/xul-ext/gnome-keyring/
/usr/share/xul-ext/gnome-keyring/components/
/usr/share/xul-ext/gnome-keyring/components/loginManagerStorage.js
/usr/share/xul-ext/gnome-keyring/content/
/usr/share/xul-ext/gnome-keyring/content/gnome-keyring.js
/usr/share/xul-ext/gnome-keyring/content/options.js
/usr/share/xul-ext/gnome-keyring/content/options.xul
/usr/share/xul-ext/gnome-keyring/install.rdf
/usr/share/xul-ext/gnome-keyring/chrome.manifest
/usr/share/xul-ext/gnome-keyring/defaults/
/usr/share/xul-ext/gnome-keyring/defaults/preferences/
/usr/share/xul-ext/gnome-keyring/defaults/preferences/defaults.js
/usr/share/xul-ext/gnome-keyring/chrome/
/usr/share/xul-ext/gnome-keyring/chrome/skin/
/usr/share/xul-ext/gnome-keyring/chrome/skin/hicolor/
/usr/share/xul-ext/gnome-keyring/chrome/skin/hicolor/seahorse.svg
/usr/share/doc/
/usr/share/doc/xul-ext-gnome-keyring/
/usr/share/doc/xul-ext-gnome-keyring/changelog.Debian.gz
/usr/share/doc/xul-ext-gnome-keyring/copyright
/usr/share/doc/xul-ext-gnome-keyring/examples/
/usr/share/doc/xul-ext-gnome-keyring/examples/moz-sec-get.sh
/usr/share/mozilla/
/usr/share/mozilla/extensions/
/usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/
/usr/share/mozilla/extensions/{3550f703-e582-4d05-9a08-453d09bdfdc6}/
/usr/share/xul-ext/gnome-keyring/defaults/preferences/000system.js
/usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/gnome-keyring-integration@sebastianwick.net
/usr/share/mozilla/extensions/{3550f703-e582-4d05-9a08-453d09bdfdc6}/gnome-keyring-integration@sebastianwick.net