diff --git a/4chan_x.user.js b/4chan_x.user.js
index 063341774..6d185e176 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1331,19 +1331,17 @@
       }
 
       _Class.prototype.setFile = function(file) {
-        var reader,
-          _this = this;
+        var url;
         this.file = file;
         this.el.title = file.name;
         if (file.type === 'application/pdf') {
           this.el.style.backgroundImage = null;
           return;
         }
-        reader = new FileReader();
-        reader.onload = function() {
-          return _this.el.style.backgroundImage = "url(" + reader.result + ")";
-        };
-        return reader.readAsDataURL(file);
+        url = window.URL || window.webkitURL;
+        url.revokeObjectURL(this.url);
+        this.url = url.createObjectURL(file);
+        return this.el.style.backgroundImage = "url(" + this.url + ")";
       };
 
       _Class.prototype.select = function() {
@@ -1360,7 +1358,11 @@
         return _results;
       };
 
-      _Class.prototype.rm = function() {};
+      _Class.prototype.rm = function() {
+        var url;
+        url = window.URL || window.webkitURL;
+        return url.revokeObjectURL(this.url);
+      };
 
       return _Class;
 
diff --git a/script.coffee b/script.coffee
index a8f7d9d44..355ec9ba6 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1001,9 +1001,10 @@ qr =
       if file.type is 'application/pdf'
         @el.style.backgroundImage = null
         return
-      reader = new FileReader()
-      reader.onload = => @el.style.backgroundImage = "url(#{reader.result})"
-      reader.readAsDataURL file
+      url = window.URL or window.webkitURL
+      url.revokeObjectURL @url
+      @url = url.createObjectURL file
+      @el.style.backgroundImage = "url(#{@url})"
     select: ->
       qr.selected?.el.id = null
       qr.selected = @
@@ -1012,6 +1013,8 @@ qr =
         $("[name=#{data}]", qr.el).value = @[data]
     rm: ->
       # rm reply from qr.replies and the UI
+      url = window.URL or window.webkitURL
+      url.revokeObjectURL @url
 
 
   dialog: ->