yakir@localhost ~ $ profile-cleaner f
profile-cleaner v2.30
Cleaning profile for firefox
Cleaning webappsstore.sqlite done -.03 Mbytes
Cleaning stylish.sqlite done -0 Mbytes
Cleaning signons.sqlite done -0 Mbytes
Cleaning readItLater.sqlite done -0 Mbytes
Cleaning places.sqlite-wal done -0 Mbytes
Cleaning places.sqlite done -22.31 Mbytes
Cleaning permissions.sqlite done -0 Mbytes
Cleaning netpredictions.sqlite done -0 Mbytes
Cleaning healthreport.sqlite done -0 Mbytes
Cleaning formhistory.sqlite done -0 Mbytes
Cleaning extensions.sqlite done -0 Mbytes
Cleaning dta_queue.sqlite done -0 Mbytes
Cleaning cookies.sqlite done -.25 Mbytes
Cleaning content-prefs.sqlite done -0 Mbytes
Cleaning addons.sqlite done -0 Mbytes
du: cannot access ‘/home/yakir/.mozilla/firefox/{{PROFILE_ID}}.default/places.sqlite-wal’: No such file or directory
Profile(s) for firefox reduced by 22.93 Mbytes.
And when I press this command again I don't get this error (just when my Firefox open & close).