Don't affect 404/error pages.

4chan_x.user.js

@@ -97,7 +97,7 @@
         'Auto Watch Reply': [false, 'Automatically watch threads you reply to.']
       },
       Posting: {
-        'Quick Reply': [true, 'WMD.'],
+        'Quick Reply': [true, 'Weapon of mass destruction.'],
         'Persistent QR': [false, 'The Quick reply won\'t disappear after posting.'],
         'Auto Hide QR': [false, 'Automatically hide the quick reply when posting.'],
         'Remember Subject': [false, 'Remember the subject field, instead of resetting after posting.'],
@@ -1020,6 +1020,9 @@
       $.asap((function() {
         return d.body;
       }), function() {
+        if ($('link[href*="favicon-status.ico"]', d.head)) {
+          return;
+        }
         return $.prepend(d.body, Header.headerEl);
       });
       return $.asap((function() {
@@ -4738,15 +4741,9 @@
       $.on(d, 'dragover', QR.dragOver);
       $.on(d, 'drop', QR.dropFile);
       $.on(d, 'dragstart dragend', QR.drag);
-      $.on(d, '4chanXInitFinished', function() {
+      if (Conf['Persistent QR']) {
-        if (!Conf['Persistent QR']) {
+        $.on(d, '4chanXInitFinished', QR.persist);
-          return;
+      }
-        }
-        QR.open();
-        if (Conf['Auto Hide QR']) {
-          return QR.hide();
-        }
-      });
       $.on(d, 'ThreadUpdate', function() {
         if (g.DEAD) {
           return QR.abort();
@@ -4762,6 +4759,12 @@
     node: function() {
       return $.on($('a[title="Quote this post"]', this.nodes.info), 'click', QR.quote);
     },
+    persist: function() {
+      QR.open();
+      if (Conf['Auto Hide QR']) {
+        return QR.hide();
+      }
+    },
     open: function() {
       if (QR.el) {
         QR.el.hidden = false;
@@ -6091,6 +6094,9 @@
     },
     initStyle: function() {
       var MutationObserver, mainStyleSheet, observer, setStyle, style, styleSheets, _ref;
+      if ($('link[href*="favicon-status.ico"]', d.head)) {
+        return;
+      }
       if ((_ref = $('link[href*=mobile]', d.head)) != null) {
         _ref.disabled = true;
       }

src/config.coffee

@@ -42,7 +42,7 @@ Config =
       'Auto Watch':                   [true,  'Automatically watch threads you start.']
       'Auto Watch Reply':             [false, 'Automatically watch threads you reply to.']
     Posting:
-      'Quick Reply':                  [true,  'WMD.']
+      'Quick Reply':                  [true,  'Weapon of mass destruction.']
       'Persistent QR':                [false, 'The Quick reply won\'t disappear after posting.']
       'Auto Hide QR':                 [false, 'Automatically hide the quick reply when posting.']
       'Remember Subject':             [false, 'Remember the subject field, instead of resetting after posting.']

src/features.coffee

@@ -46,6 +46,9 @@ Header =
       order: 105
 
     $.asap (-> d.body), ->
+      if $ 'link[href*="favicon-status.ico"]', d.head
+        # 404 error page or similar.
+        return
       $.prepend d.body, Header.headerEl
     $.asap (-> $.id 'boardNavDesktop'), @setBoardList
 

src/main.coffee

@@ -350,6 +350,9 @@ Main =
     $.ready Main.initReady
 
   initStyle: ->
+    if $ 'link[href*="favicon-status.ico"]', d.head
+      # 404 error page or similar.
+      return
     # disable the mobile layout
     $('link[href*=mobile]', d.head)?.disabled = true
     $.addClass doc, $.engine

src/qr.coffee

@@ -25,13 +25,10 @@ QR =
       el: link
       order: 10
 
-    $.on d, 'dragover',          QR.dragOver
+    $.on d, 'dragover',           QR.dragOver
-    $.on d, 'drop',              QR.dropFile
+    $.on d, 'drop',               QR.dropFile
-    $.on d, 'dragstart dragend', QR.drag
+    $.on d, 'dragstart dragend',  QR.drag
-    $.on d, '4chanXInitFinished', ->
+    $.on d, '4chanXInitFinished', QR.persist if Conf['Persistent QR']
-      return unless Conf['Persistent QR']
-      QR.open()
-      QR.hide() if Conf['Auto Hide QR']
     $.on d, 'ThreadUpdate', ->
       if g.DEAD
         QR.abort()
@@ -45,6 +42,9 @@ QR =
   node: ->
     $.on $('a[title="Quote this post"]', @nodes.info), 'click', QR.quote
 
+  persist: ->
+    QR.open()
+    QR.hide() if Conf['Auto Hide QR']
   open: ->
     if QR.el
       QR.el.hidden = false