/usr/share/xul-ext/ is in xul-ext-video-without-flash 3.1.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xul-ext/video-without-flash/
/usr/share/xul-ext/video-without-flash/LICENSE
/usr/share/xul-ext/video-without-flash/README.md
/usr/share/xul-ext/video-without-flash/bootstrap.js
/usr/share/xul-ext/video-without-flash/chrome.manifest
/usr/share/xul-ext/video-without-flash/content/
/usr/share/xul-ext/video-without-flash/content/list_modules.js
/usr/share/xul-ext/video-without-flash/content/listener.js
/usr/share/xul-ext/video-without-flash/content/modules/
/usr/share/xul-ext/video-without-flash/content/modules/FC2.jsm
/usr/share/xul-ext/video-without-flash/content/modules/HTML5.jsm
/usr/share/xul-ext/video-without-flash/content/modules/Makefile.in
/usr/share/xul-ext/video-without-flash/content/modules/ScreenWaveMedia.jsm
/usr/share/xul-ext/video-without-flash/content/modules/blip.jsm
/usr/share/xul-ext/video-without-flash/content/modules/dailymotion.jsm
/usr/share/xul-ext/video-without-flash/content/modules/niconico.jsm
/usr/share/xul-ext/video-without-flash/content/modules/youtube.jsm
/usr/share/xul-ext/video-without-flash/content/options.xul
/usr/share/xul-ext/video-without-flash/content/player.js
/usr/share/xul-ext/video-without-flash/content/prefs.js
/usr/share/xul-ext/video-without-flash/content/prefs_modules_list.xul
/usr/share/xul-ext/video-without-flash/content/utils.js
/usr/share/xul-ext/video-without-flash/content/vwof.js
/usr/share/xul-ext/video-without-flash/install.rdf
/usr/share/xul-ext/video-without-flash/locale/
/usr/share/xul-ext/video-without-flash/locale/en-US/
/usr/share/xul-ext/video-without-flash/locale/en-US/listener.properties
/usr/share/xul-ext/video-without-flash/locale/en-US/options.dtd
/usr/share/xul-ext/video-without-flash/locale/en-US/player.properties
/usr/share/xul-ext/video-without-flash/locale/fr-FR/
/usr/share/xul-ext/video-without-flash/locale/fr-FR/listener.properties
/usr/share/xul-ext/video-without-flash/locale/fr-FR/options.dtd
/usr/share/xul-ext/video-without-flash/locale/fr-FR/player.properties
/usr/share/xul-ext/video-without-flash/locale/jp-JP/
/usr/share/xul-ext/video-without-flash/locale/jp-JP/listener.properties
/usr/share/xul-ext/video-without-flash/locale/jp-JP/player.properties
/usr/share/xul-ext/video-without-flash/skin/
/usr/share/xul-ext/video-without-flash/skin/player.css
/usr/share/xul-ext/video-without-flash/skin/video-icon.png