/usr/lib/ is in firefox-locale-fi 28.0+build2-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/firefox/distribution/searchplugins/
/usr/lib/firefox/distribution/searchplugins/locale/
/usr/lib/firefox/
/usr/lib/firefox/distribution/
/usr/lib/firefox/distribution/searchplugins/locale/fi/
/usr/lib/firefox/distribution/searchplugins/locale/fi/google.xml
/usr/lib/firefox/distribution/searchplugins/locale/fi/yahoo-fi.xml
/usr/lib/firefox/distribution/searchplugins/locale/fi/eBay-fi.xml
/usr/lib/firefox/distribution/searchplugins/locale/fi/duckduckgo.xml
/usr/lib/firefox/distribution/searchplugins/locale/fi/bookplus-fi.xml
/usr/lib/firefox/distribution/searchplugins/locale/fi/bing.xml
/usr/lib/firefox/distribution/searchplugins/locale/fi/wikipedia-fi.xml
/usr/lib/firefox-addons/
/usr/lib/firefox-addons/extensions/
/usr/lib/firefox-addons/extensions/langpack-fi@firefox.mozilla.org.xpi