Firefox returns status code 0 for cross domain requests, don't reload pictures only in 404'd threads.

Close #22

4chan_x.user.js

@@ -2876,7 +2876,7 @@
       img = $.el('img', {
         src: a.href
       });
-      if (engine === "gecko" && a.parentNode.className !== 'op') {
+      if (engine === 'gecko' && a.parentNode.className !== 'op') {
         filesize = $('.filesize', a.parentNode);
         _ref = filesize.textContent.match(/(\d+)x/), _ = _ref[0], max = _ref[1];
         img.style.maxWidth = "" + max + "px";
@@ -2889,7 +2889,7 @@
       var req, thumb;
       thumb = this.previousSibling;
       imgExpand.contract(thumb);
-      if (navigator.appName !== 'Opera') {
+      if (engine === 'webkit') {
         req = $.ajax(this.src, null, 'head');
         return req.onreadystatechange = function() {
           if (this.status !== 404) {

changelog

@@ -2,6 +2,7 @@ master
 - mayhem
   new Indicate Duckrolls feature
   put regex.info sauce back - disabled by default
+  fix for auto image reloading in 404'd threads on Firefox
 
 2.21.4
 - mayhem

script.coffee

@@ -2203,7 +2203,7 @@ imgExpand =
     a = thumb.parentNode
     img = $.el 'img',
       src: a.href
-    if engine is "gecko" and a.parentNode.className isnt 'op'
+    if engine is 'gecko' and a.parentNode.className isnt 'op'
       filesize = $ '.filesize', a.parentNode
       [_, max] = filesize.textContent.match /(\d+)x/
       img.style.maxWidth = "#{max}px"
@@ -2215,9 +2215,11 @@ imgExpand =
     thumb = @previousSibling
     imgExpand.contract thumb
     #navigator.online is not x-browser/os yet
-    if navigator.appName isnt 'Opera'
+    if engine is 'webkit'
       req = $.ajax @src, null, 'head'
       req.onreadystatechange = -> setTimeout imgExpand.retry, 10000, thumb if @status isnt 404
+    #Firefox returns a status code of 0 because of the same origin policy
+    #Oprah doesn't send any request
     else unless g.dead
       setTimeout imgExpand.retry, 10000, thumb
   retry: (thumb) ->