:~$ locate firefox
/var/lib/dpkg/alternatives/firefox-homepage
/var/lib/dpkg/info/mozilla-firefox-locale-en-gb.list
/var/lib/dpkg/info/mozilla-firefox-locale-en-gb.md5sums
/var/lib/mozilla-firefox
/var/lib/mozilla-firefox/extensions.d
/var/lib/mozilla-firefox/extensions.d/50en-GB-locale.ext
/etc/alternatives/firefox-homepage-locales
/etc/alternatives/firefox-homepage
/usr/lib/firefox
/usr/lib/firefox/extensions
/usr/lib/firefox/extensions/langpack-en-GB@firefox.mozilla.org
/usr/lib/firefox/extensions/langpack-en-GB@firefox.mozilla.org/chrome
/usr/lib/firefox/extensions/langpack-en-GB@firefox.mozilla.org/chrome/en-GB.jar
/usr/lib/firefox/extensions/langpack-en-GB@firefox.mozilla.org/uninstall
/usr/lib/firefox/extensions/langpack-en-GB@firefox.mozilla.org/uninstall/Uninstall
/usr/lib/firefox/extensions/langpack-en-GB@firefox.mozilla.org/chrome.manifest
/usr/lib/firefox/extensions/langpack-en-GB@firefox.mozilla.org/install.rdf
/usr/lib/firefox/libnssckbi.so
/usr/share/app-install/desktop/firefox.desktop
/usr/share/doc/mozilla-firefox-locale-en-gb
/usr/share/doc/mozilla-firefox-locale-en-gb/changelog.Debian.gz
/usr/share/doc/mozilla-firefox-locale-en-gb/copyright
/usr/share/icons/crystalsvg/16x16/apps/firefox.png
/usr/share/icons/crystalsvg/32x32/apps/firefox.png
/usr/share/icons/crystalsvg/48x48/apps/firefox.png
/usr/share/services/useragentstrings/firefoxoncurrent.desktop