I checked it already, no error message. Only after start of the program I got:
(seamonkey:4673): Gtk-WARNING **: Locale not supported by C library.
Using the fallback 'C' locale.
but I think this is without meaning.
But just now I realize, there is coming more:
1494006206108 addons.update-checker WARN Update manifest for {972ce4c6-7e08-4474-a285-3208198ce6fd} did not contain an updates property
Now I'll try to view stored cookies once more.
Nothing happend, no further output in the terminal window.
One final remark, I have no idea, if it could be important: Some weeks ago I made an upgrade from v7.2 to v8 of TC the same way I did before for minor upgrades only, i.e. f.i. from v7.1 to 7.2. That means I replaced only core.gz and vmlinuz and did all necessary extension upgrades using the apps tool.