Alacarte not saving menu changes

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http://www.linuxquestions.org – I recently upgraded Firefox & found that when I go to alacarte to make link to firefox icon it won't save, not only does alacarte not work correctly but gedit is affected also. Obviously it is a config file but which would I make corrections to to get them working correctly? Here I have attached xsession errors. Code: /etc/gdm3/Xsession: Beginning session setup... localuser:edward being added to access control list openConnection: connect: No such file or directory cannot connect to brltty at :0 GNOME_KEYRING_CONTROL=/home/edward/.cache/keyring-KqyZd8 GPG_AGENT_INFO=/home/edward/.cache (HowTos)