Let the default responseType in $.ajax always be "json" regardless of URL.

src/Miscellaneous/Report.coffee

@@ -77,7 +77,6 @@ Report =
     for [name, url] in urls
       do (name, url) ->
         $.ajax url,
-          responseType: 'json'
           onloadend: ->
             results.push [name, @response or {error: ''}]
             if results.length is urls.length

src/platform/$.coffee

@@ -52,7 +52,7 @@ $.ajax = do ->
 
   (url, options={}, extra={}) ->
     {type, whenModified, bypassCache, upCallbacks, form} = extra
-    options.responseType ?= 'json' if /\.json$/.test url
+    options.responseType ?= 'json'
     # XXX https://forums.lanik.us/viewtopic.php?f=64&t=24173&p=78310
     url = url.replace /^((?:https?:)?\/\/(?:\w+\.)?4c(?:ha|d)n\.org)\/adv\//, '$1//adv/'
     if whenModified

src/platform/CrossOrigin.coffee

@@ -90,7 +90,7 @@ CrossOrigin =
       unless GM?.xmlHttpRequest? or GM_xmlhttpRequest?
         if bypassCache
           $.cleanCache (url2) -> url2 is url
-        if (req = $.cache url, cb, responseType: 'json')
+        if (req = $.cache url, cb)
           $.on req, 'abort error', -> cb.call({})
         else
           cb.call {}