nsISecurityPref Interface

 Called to clear a user set value from a "capability" preference. This
 will, in effect, reset the value to the default value. If no default value
 exists the preference will cease to exist.

 @param pref_name The preference to be cleared.

 @note
 This method does nothing if this object is a default branch.

 @return NS_OK The user preference was successfully cleared.
 @return Other The preference does not exist or have a user set value.

void securityClearUserPref(in string pref_name)

 Called to get the state of a "capability" boolean preference.

 @param pref     The boolean preference to get the state of.

 @return boolean The value of the requested boolean preference.

 @see securitySetBoolPref

boolean securityGetBoolPref(in string pref)

 Called to get the state of a "capability" string preference.

 @param pref    The string preference to retrieve.

 @return string The value of the requested string preference.

 @see securitySetCharPref

string securityGetCharPref(in string pref)

 Called to get the state of a "capability" integer preference.

 @param pref  The integer preference to get the value of.

 @return long The value of the requested integer preference.

 @see securitySetIntPref

long securityGetIntPref(in string pref)

 Called to set the state of a "capability" boolean preference.

 @param pref   The boolean preference to set the state of.
 @param value  The boolean value to set the preference to.

 @return NS_OK The value was successfully set.
 @return Other The value was not set or is the wrong type.

 @see securityGetBoolPref

void securitySetBoolPref(in string pref, in boolean value)

 Called to set the state of a "capability" string preference.

 @param pref   The string preference to set.
 @param value  The string value to set the preference to.

 @return NS_OK The value was successfully set.
 @return Other The value was not set or is the wrong type.

 @see securityGetCharPref

void securitySetCharPref(in string pref, in string value)

 Called to set the state of a "capability" integer preference.

 @param pref   The integer preference to set the value of.
 @param value  The integer value to set the preference to.

 @return NS_OK The value was successfully set.
 @return Other The value was not set or is the wrong type.

 @see securityGetIntPref

void securitySetIntPref(in string pref, in long value)