diff --git a/4chan_x.user.js b/4chan_x.user.js
index f8abe22d6..dcf971914 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -332,15 +332,14 @@
       return fd;
     },
     ajax: function(url, callbacks, opts) {
-      var form, headers, key, r, responseType, type, upCallbacks, val;
+      var form, headers, key, r, type, upCallbacks, val;
       if (opts == null) {
         opts = {};
       }
-      type = opts.type, responseType = opts.responseType, headers = opts.headers, upCallbacks = opts.upCallbacks, form = opts.form;
+      type = opts.type, headers = opts.headers, upCallbacks = opts.upCallbacks, form = opts.form;
       r = new XMLHttpRequest();
       type || (type = form && 'post' || 'get');
       r.open(type, url, true);
-      r.responseType = $.engine === 'presto' && responseType === 'document' ? '' : responseType || '';
       for (key in headers) {
         val = headers[key];
         r.setRequestHeader(key, val);
@@ -2132,7 +2131,6 @@
       };
       opts = {
         form: $.formData(post),
-        responseType: 'document',
         upCallbacks: {
           onload: function() {
             return QR.status({
@@ -2148,14 +2146,10 @@
       };
       return QR.ajax = $.ajax($.id('postForm').parentNode.action, callbacks, opts);
     },
-    response: function(response) {
+    response: function(html) {
       var bs, doc, err, msg, persona, postNumber, reply, thread, _, _ref;
-      if ($.engine === 'presto') {
-        doc = d.implementation.createHTMLDocument('');
-        doc.documentElement.innerHTML = response;
-      } else {
-        doc = response;
-      }
+      doc = d.implementation.createHTMLDocument('');
+      doc.documentElement.innerHTML = html;
       if (doc.title === '4chan - Banned') {
         bs = $$('b', doc);
         err = $.el('span', {
@@ -2639,12 +2633,8 @@
           return;
         }
         Updater.lastModified = this.getResponseHeader('Last-Modified');
-        if ($.engine === 'presto') {
-          doc = d.implementation.createHTMLDocument('');
-          doc.documentElement.innerHTML = this.response;
-        } else {
-          doc = this.response;
-        }
+        doc = d.implementation.createHTMLDocument('');
+        doc.documentElement.innerHTML = this.response;
         lastPost = Updater.thread.lastElementChild;
         id = lastPost.id.slice(2);
         nodes = [];
@@ -2696,7 +2686,6 @@
       return Updater.request = $.ajax(url, {
         onload: Updater.cb.update
       }, {
-        responseType: 'document',
         headers: {
           'If-Modified-Since': Updater.lastModified
         }
@@ -3764,18 +3753,13 @@
           return DeleteButton.error(self);
         }
       }, {
-        form: $.formData(form),
-        responseType: 'document'
+        form: $.formData(form)
       });
     },
-    load: function(self, response) {
+    load: function(self, html) {
       var doc, msg, s;
-      if ($.engine === 'presto') {
-        doc = d.implementation.createHTMLDocument('');
-        doc.documentElement.innerHTML = response;
-      } else {
-        doc = response;
-      }
+      doc = d.implementation.createHTMLDocument('');
+      doc.documentElement.innerHTML = html;
       if (doc.title === '4chan - Banned') {
         s = 'Banned!';
       } else if (msg = doc.getElementById('errmsg')) {
diff --git a/script.coffee b/script.coffee
index c54ceec97..cb72e3a67 100644
--- a/script.coffee
+++ b/script.coffee
@@ -274,15 +274,10 @@ $.extend $,
         fd.append key, val if val
     fd
   ajax: (url, callbacks, opts={}) ->
-    {type, responseType, headers, upCallbacks, form} = opts
+    {type, headers, upCallbacks, form} = opts
     r = new XMLHttpRequest()
     type or= form and 'post' or 'get'
     r.open type, url, true
-    r.responseType =
-      if $.engine is 'presto' and responseType is 'document'
-        ''
-      else
-        responseType or ''
     for key, val of headers
       r.setRequestHeader key, val
     $.extend r, callbacks
@@ -1618,7 +1613,6 @@ QR =
           textContent: 'Connection error, or you are banned.'
     opts =
       form: $.formData post
-      responseType: 'document'
       upCallbacks:
         onload: ->
           # Upload done, waiting for response.
@@ -1629,12 +1623,9 @@ QR =
 
     QR.ajax = $.ajax $.id('postForm').parentNode.action, callbacks, opts
 
-  response: (response) ->
-    if $.engine is 'presto'
-      doc = d.implementation.createHTMLDocument ''
-      doc.documentElement.innerHTML = response
-    else
-      doc = response
+  response: (html) ->
+    doc = d.implementation.createHTMLDocument ''
+    doc.documentElement.innerHTML = html
     if doc.title is '4chan - Banned' # Ban/warn check
       bs  = $$ 'b', doc
       err = $.el 'span',
@@ -2080,11 +2071,8 @@ Updater =
         return
       Updater.lastModified = @getResponseHeader 'Last-Modified'
 
-      if $.engine is 'presto'
-        doc = d.implementation.createHTMLDocument ''
-        doc.documentElement.innerHTML = @response
-      else
-        doc = @response
+      doc = d.implementation.createHTMLDocument ''
+      doc.documentElement.innerHTML = @response
 
       lastPost = Updater.thread.lastElementChild
       id = lastPost.id[2..]
@@ -2118,16 +2106,15 @@ Updater =
 
   retry: ->
     @count.textContent = 'Retry'
-    @count.className   = null
+    @count.className = null
     @update()
 
   update: ->
     Updater.timer.textContent = 0
     Updater.request?.abort()
-    # Fool the cache.
+    #fool the cache
     url = location.pathname + '?' + Date.now()
     Updater.request = $.ajax url, onload: Updater.cb.update,
-      responseType: 'document'
       headers: 'If-Modified-Since': Updater.lastModified
 
 Watcher =
@@ -2954,15 +2941,11 @@ DeleteButton =
         onerror: -> DeleteButton.error self
       }, {
         form: $.formData form
-        responseType: 'document'
       }
 
-  load: (self, response) ->
-    if $.engine is 'presto'
-      doc = d.implementation.createHTMLDocument ''
-      doc.documentElement.innerHTML = response
-    else
-      doc = response
+  load: (self, html) ->
+    doc = d.implementation.createHTMLDocument ''
+    doc.documentElement.innerHTML = html
     if doc.title is '4chan - Banned' # Ban/warn check
       s = 'Banned!'
     else if msg = doc.getElementById 'errmsg' # error!