You can right-click each of those entries and click Reset to reset the pref to the default and the pref will be removed from about:config the next time you start Firefox.

• http://kb.mozillazine.org/about:config

I reset all of the entries and restarted my computer and the entries are still there.

Are those entries also still present if you close and restart Firefox without rebooting the computer?

See also:

• http://kb.mozillazine.org/Preferences_not_saved

I reset them again and restarted firefox and they are gone. Thank you!!