The field is supposed to be blank by default. An entry is (or at least should be) created the first time you try to download a certain mime-type, select an action for it, and tell it to "remember" that action. After that, you can use the field to change the application used.
Deleting the mime file simply removes all existing entries. Plugins are a separate system and disabling them doesn't affect the mime-type selection, except for deciding whether or not they open in-window. (Plugin actions should show up in the field though).
I know there was at least one extention out there that allowed you to create new entries as well as edit them, but I don't remember exactly which one it was or if it's still available. "Things They Left Out", maybe? There may be others now that can do the same thing.
Last edited by David the H.; 08-16-2006 at 02:45 AM.
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