|Definitions of Web, Deep Web and Dark Net|
|Mozilla Preferences||Search for a title, author or keyword|
A preference is any value or defined behavior that can be set (presumably, one setting is "preferable" to another). about:config is a feature of Mozilla applications which lists application settings (known as preferences) that are read from the profile files prefs.js and user.js, and from application defaults. This is a reference to the entries in about:config, where all user preferences can be viewed and modified.
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