Settle stupid naming dispute.

common/modules/base.jsm

@@ -1071,17 +1071,6 @@ const array = Class("array", Array, {
     equals: function (ary1, ary2)
         ary1.length === ary2.length && Array.every(ary1, function (e, i) e === ary2[i]),
 
-    /**
-     * Returns the first member of the given array that matches the
-     * given predicate.
-     */
-    first: function first(ary, pred, self) {
-        for (let elem in values(ary))
-            if (pred.call(self, elem))
-                return elem;
-        return undefined;
-    },
-
     /**
      * Flattens an array, such that all elements of the array are
      * joined into a single array:
@@ -1116,6 +1105,17 @@ const array = Class("array", Array, {
             yield [i, ary[i]];
     },
 
+    /**
+     * Returns the nth member of the given array that matches the
+     * given predicate.
+     */
+    nth: function first(ary, pred, n, self) {
+        for (let elem in values(ary))
+            if (pred.call(self, elem) && n-- === 0)
+                return elem;
+        return undefined;
+    },
+
     /**
      * Filters out all duplicates from an array. If *unsorted* is false, the
      * array is sorted before duplicates are removed.

common/modules/sanitizer.jsm

@@ -624,8 +624,7 @@ const Sanitizer = Module("sanitizer", XPCOM([Ci.nsIObserver, Ci.nsISupportsWeakR
                     ["prompt",  "Always prompt for a lifetime"],
                     ["session", "The current session"]
                 ],
-                getter: function () (this.completer()[prefs.get(this.PREF)]
-                        || [prefs.get(this.PREF_DAYS)])[0],
+                getter: function () (this.completer()[prefs.get(this.PREF)] || [prefs.get(this.PREF_DAYS)])[0],
                 setter: function (value) {
                     let val = this.completer().map(function (i) i[0]).indexOf(value);
                     if (val > -1)