diff --git a/4chan_x.js b/4chan_x.js
index 353fb8225..fc306ea8e 100644
--- a/4chan_x.js
+++ b/4chan_x.js
@@ -1341,6 +1341,7 @@
             input.value = 404;
           }
           d.title = d.title.match(/.+- /)[0] + 404;
+          g.dead = true;
           Favicon.update();
           return;
         }
@@ -1678,7 +1679,7 @@
       l = unread.replies.length;
       if (g.dead) {
         if (l > 0) {
-          href = Favicon.headHalo;
+          href = Favicon.deadHalo;
         } else {
           href = Favicon.dead;
         }
@@ -1692,6 +1693,7 @@
       favicon = $('link[rel="shortcut icon"]', d.head);
       clone = favicon.cloneNode(true);
       clone.href = href;
+      clone.setAttribute('type', 'image/x-icon');
       return $.replace(favicon, clone);
     }
   };
diff --git a/script.coffee b/script.coffee
index a6012e3ed..e29a4a430 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1055,6 +1055,7 @@ updater =
           input.disabled = true
           input.value = 404
         d.title = d.title.match(/.+- /)[0] + 404
+        g.dead = true
         Favicon.update()
         return
 
@@ -1309,7 +1310,7 @@ Favicon =
     l = unread.replies.length
     if g.dead
       if l > 0
-        href = Favicon.headHalo
+        href = Favicon.deadHalo
       else
         href = Favicon.dead
     else
@@ -1318,10 +1319,11 @@ Favicon =
       else
         href = Favicon.default
 
-    #XXX `favicon.href = href` doesn't work
+    #XXX `favicon.href = href` doesn't work on Firefox
     favicon = $ 'link[rel="shortcut icon"]', d.head
     clone = favicon.cloneNode true
     clone.href = href
+    clone.setAttribute 'type', 'image/x-icon'
     $.replace favicon, clone