Comment 3 for bug 810299

I had other systemwide changes to make as well...

But yes, that file should be removed. Along with /usr/lib/firefox-5.0/defaults/pref/vendor.js and /usr/lib/firefox-5.0/defaults/pref/syspref.js which doesn't work either.

Actually /usr/lib/firefox-5.0/defaults/pref/syspref.js links to /etc/firefox/syspref.js. Couldn't the solution be to link /etc/xul-ext/ubufox.js from xul-ext-ubufox to /etc/firefox/syspref.js?