FAQ:

Where have all the preferences gone?

Answer:

Galeon 1.3 is designed to be simpler to use and configure for the average user. This has meant that some preferences that were in Galeon 1.2 are no longer available. However, quite a lot of preferences are available, they just don't have a user interface.

For information on these hidden preferences, look in the README.ExtraPrefs file that is distributed with galeon. The current CVS version of this file is also available online. The online version may be slightly different from your local copy, as features are added and changed.