Inspiriert von demayas Post zum Profile-Cleaner habe ich den nun mal auf meine Firefox-Profile losgeglassen. Da er zum Vergleich aufgerufen hat, veröffentliche ich hier mein Ergebnis.

~$ profile-cleaner f
profile-cleaner v2.31

 Cleaning profile for firefox
 Cleaning search.sqlite                        done  -0 Mbytes
 Cleaning addons.sqlite                        done  -.09 Mbytes
 Cleaning formhistory.sqlite                   done  -.28 Mbytes
 Cleaning netpredictions.sqlite                done  -2.75 Mbytes
 Cleaning signons.sqlite                       done  -.02 Mbytes
 Cleaning healthreport.sqlite                  done  -0 Mbytes
 Cleaning youscrobble_new_yt.db                done  -0 Mbytes
 Cleaning kb-saver.db                          done  -0 Mbytes
 Cleaning ffixer.db                            done  -0 Mbytes
 Cleaning seamappa.db                          done  -0 Mbytes
 Cleaning content-prefs.sqlite                 done  -.02 Mbytes
 Cleaning lazarus-backup.sqlite                done  -.03 Mbytes
 Cleaning urlclassifier2.sqlite.old            done  -2.27 Mbytes
 Cleaning cookies.sqlite                       done  -1.42 Mbytes
 Cleaning formhistory.sqlite.old               done  -.53 Mbytes
 Cleaning readItLater.sqlite                   done  -.09 Mbytes
 Cleaning lazarus.sqlite                       done  -.03 Mbytes
 Cleaning places.sqlite                        done  -7.90 Mbytes
 Cleaning webappsstore.sqlite                  done  -11.21 Mbytes
 Cleaning ybookmarks.sqlite                    done  -0 Mbytes
 Cleaning permissions.sqlite                   done  -.08 Mbytes
 Cleaning extensions.sqlite                    done  -.06 Mbytes
 Cleaning urlclassifier3.sqlite.old            done  -17.06 Mbytes
 Cleaning formhistory.sqlite                   done  -0 Mbytes
 Cleaning signons.sqlite                       done  -0 Mbytes
 Cleaning healthreport.sqlite                  done  -0 Mbytes
 Cleaning content-prefs.sqlite                 done  -0 Mbytes
 Cleaning lazarus-backup.sqlite                done  -0 Mbytes
 Cleaning cookies.sqlite                       done  -.50 Mbytes
 Cleaning readItLater.sqlite                   done  -.09 Mbytes
 Cleaning lazarus.sqlite                       done  -0 Mbytes
 Cleaning places.sqlite                        done  -2.34 Mbytes
 Cleaning webappsstore.sqlite                  done  -.46 Mbytes
 Cleaning permissions.sqlite                   done  -0 Mbytes
 Cleaning extensions.sqlite                    done  -0 Mbytes

 Profile(s) for firefox reduced by 47.30 Mbytes.

Ich habe fast 50 MB gewonnen! Wow! Das hat sich gelohnt, wobei es sicherlich auch mit an meinen zwei Profilen liegt. Die Installation vom Profile-Cleaner war schnell erledigt und kann unter Arch Linux mit

yaourt -S profile-cleaner

durchgeführt werden.