Chromium now follows Firefox's policy on the download attribute.

src/Menu/DownloadLink.coffee

@@ -6,9 +6,7 @@ DownloadLink =
       className: 'download-link'
       textContent: 'Download file'
 
-    <% if (type === 'userscript') { %>
-    unless chrome?
-      # Firefox places same-origin restrictions on links with the download attribute.
+    # Specifying the filename with the download attribute only works for same-origin links.
     $.on a, 'click', (e) ->
       return true if @protocol is 'blob:'
       e.preventDefault()
@@ -18,7 +16,6 @@ DownloadLink =
           @click()
         else
           new Notice 'error', "Could not download #{file.URL}", 30
-    <% } %>
 
     $.event 'AddMenuEntry',
       type: 'post'