diff --git a/4chan_x.user.js b/4chan_x.user.js
index a2e94cf3c..8da72d76f 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -737,7 +737,7 @@
         }
         this.file.size = size;
         this.file.thumbURL = that.isArchived ? thumb.src : "" + location.protocol + "//thumbs.4chan.org/" + board + "/thumb/" + (this.file.URL.match(/(\d+)\./)[1]) + "s.jpg";
-        this.file.name = $('span[title]', this.file.info).title;
+        this.file.name = $('span[title]', this.file.info).title.replace(/%22/g, '"');
         if (this.file.isImage = /(jpg|png|gif)$/i.test(this.file.name)) {
           this.file.dimensions = this.file.text.textContent.match(/\d+x\d+/)[0];
         }
diff --git a/script.coffee b/script.coffee
index 8b46f22a2..0ccda9e16 100644
--- a/script.coffee
+++ b/script.coffee
@@ -586,7 +586,12 @@ class Post
           thumb.src
         else
           "#{location.protocol}//thumbs.4chan.org/#{board}/thumb/#{@file.URL.match(/(\d+)\./)[1]}s.jpg"
-      @file.name = $('span[title]', @file.info).title
+      # replace %22 with quotes, see:
+      # crbug.com/81193
+      # webk.it/62107
+      # https://www.w3.org/Bugs/Public/show_bug.cgi?id=16909
+      # http://www.whatwg.org/specs/web-apps/current-work/#multipart-form-data
+      @file.name = $('span[title]', @file.info).title.replace /%22/g, '"'
       if @file.isImage = /(jpg|png|gif)$/i.test @file.name
         @file.dimensions = @file.text.textContent.match(/\d+x\d+/)[0]