4Click the Add (+) button, select /Applications/Safari, and then click Add.
The preference manifests included with older versions of Safari don’t have as many configurable preferences as the Safari version included with Mac OS X v10.5 or later. You can replace old Safari preference manifests by adding the new Safari application, and then clicking Replace in the dialog that appears.
5To edit Safari preferences, select Safari (with the Preference ID com.apple.Safari), click the Edit (pencil) button, and then add keys you’d like to manage.
For more information, see “Editing Application Preferences with the Preference Editor” on page 234.
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Chapter 10 Managing Preferences