Extra condition

daemon.py

@@ -1911,6 +1911,7 @@ class PubServer(BaseHTTPRequestHandler):
 
         self._benchmarkGETtimings(GETstartTime, GETtimings, 17)
 
+        if '-background.' in self.path:
             for ext in ('webp', 'gif', 'jpg', 'png'):
                 for bg in ('follow', 'options', 'login'):
                     # follow screen background image