diff --git a/src/js/traffic.js b/src/js/traffic.js
index 456dfa8b1..42900ef47 100644
--- a/src/js/traffic.js
+++ b/src/js/traffic.js
@@ -745,7 +745,7 @@ var filterDocument = (function() {
                 utf8TextDecoder = new TextDecoder();
             }
             doc = domParser.parseFromString(
-                utf8TextDecoder.decode(filterer.buffer.slice(0, 1024)),
+                utf8TextDecoder.decode(filterer.buffer.slice(0, 4096)),
                 'text/html'
             );
             filterer.charset = µb.textEncode.normalizeCharset(charsetFromDoc(doc));