diff --git a/builds/4chan-X.js b/builds/4chan-X.js
index c106c9b98..e8162ded9 100644
--- a/builds/4chan-X.js
+++ b/builds/4chan-X.js
@@ -113,8 +113,7 @@
     __slice = [].slice,
     __hasProp = {}.hasOwnProperty,
     __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
-    __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
-    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
+    __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
 
   Config = {
     main: {
@@ -8127,12 +8126,12 @@
         hiddenPSAs: null
       };
       $.get(items, function(_arg) {
-        var hiddenPSA, hiddenPSAs, _ref;
+        var hiddenPSA, hiddenPSAs;
 
         hiddenPSA = _arg.hiddenPSA, hiddenPSAs = _arg.hiddenPSAs;
         if (hiddenPSAs) {
           $["delete"]('hiddenPSAs');
-          if (_ref = psa.textContent.replace(/\W+/g, '').toLowerCase(), __indexOf.call(hiddenPSAs, _ref) >= 0) {
+          if (hiddenPSAs.contains(psa.textContent.replace(/\W+/g, '').toLowerCase())) {
             hiddenPSA = +$.id('globalMessage').dataset.utc;
             $.set('hiddenPSA', hiddenPSA);
           }
diff --git a/builds/4chan-X.user.js b/builds/4chan-X.user.js
index 8e2b5a67a..3cffc2a21 100644
--- a/builds/4chan-X.user.js
+++ b/builds/4chan-X.user.js
@@ -113,8 +113,7 @@
     __slice = [].slice,
     __hasProp = {}.hasOwnProperty,
     __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
-    __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
-    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
+    __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
 
   Config = {
     main: {
@@ -8121,12 +8120,12 @@
         hiddenPSAs: null
       };
       $.get(items, function(_arg) {
-        var hiddenPSA, hiddenPSAs, _ref;
+        var hiddenPSA, hiddenPSAs;
 
         hiddenPSA = _arg.hiddenPSA, hiddenPSAs = _arg.hiddenPSAs;
         if (hiddenPSAs) {
           $["delete"]('hiddenPSAs');
-          if (_ref = psa.textContent.replace(/\W+/g, '').toLowerCase(), __indexOf.call(hiddenPSAs, _ref) >= 0) {
+          if (hiddenPSAs.contains(psa.textContent.replace(/\W+/g, '').toLowerCase())) {
             hiddenPSA = +$.id('globalMessage').dataset.utc;
             $.set('hiddenPSA', hiddenPSA);
           }
diff --git a/builds/crx/script.js b/builds/crx/script.js
index d8a3b0c65..986d47dbf 100644
--- a/builds/crx/script.js
+++ b/builds/crx/script.js
@@ -8104,12 +8104,12 @@
         hiddenPSAs: null
       };
       $.get(items, function(_arg) {
-        var hiddenPSA, hiddenPSAs, _ref;
+        var hiddenPSA, hiddenPSAs;
 
         hiddenPSA = _arg.hiddenPSA, hiddenPSAs = _arg.hiddenPSAs;
         if (hiddenPSAs) {
           $["delete"]('hiddenPSAs');
-          if (_ref = psa.textContent.replace(/\W+/g, '').toLowerCase(), __indexOf.call(hiddenPSAs, _ref) >= 0) {
+          if (hiddenPSAs.contains(psa.textContent.replace(/\W+/g, '').toLowerCase())) {
             hiddenPSA = +$.id('globalMessage').dataset.utc;
             $.set('hiddenPSA', hiddenPSA);
           }
diff --git a/src/Miscellaneous/AnnouncementHiding.coffee b/src/Miscellaneous/AnnouncementHiding.coffee
index 13ae4331d..81dd3954e 100644
--- a/src/Miscellaneous/AnnouncementHiding.coffee
+++ b/src/Miscellaneous/AnnouncementHiding.coffee
@@ -38,7 +38,7 @@ PSAHiding =
     $.get items, ({hiddenPSA, hiddenPSAs}) ->
       if hiddenPSAs
         $.delete 'hiddenPSAs'
-        if psa.textContent.replace(/\W+/g, '').toLowerCase() in hiddenPSAs
+        if hiddenPSAs.contains psa.textContent.replace(/\W+/g, '').toLowerCase()
           hiddenPSA = +$.id('globalMessage').dataset.utc
           $.set 'hiddenPSA', hiddenPSA
       PSAHiding.sync hiddenPSA