Allow extension origins (still needs explicit listing), fixes #1686

server/routes.go

@@ -837,6 +837,7 @@ func (s *Server) GenerateRoutes() http.Handler {
 
 	config := cors.DefaultConfig()
 	config.AllowWildcard = true
+	config.AllowBrowserExtensions = true
 
 	config.AllowOrigins = origins
 	for _, allowOrigin := range defaultAllowOrigins {