--- a/.emacs-my	Sat Aug 02 21:49:16 2014 +0300
+++ b/.emacs-my	Sat Aug 02 23:24:15 2014 +0300
@@ -2705,6 +2705,7 @@
 (add-to-list 'auto-mode-alist '("\.pom\\'" . nxml-mode))
 (add-to-list 'auto-mode-alist '("\.xsd\\'" . nxml-mode))
 (add-to-list 'auto-mode-alist '("\.rng\\'" . nxml-mode))
+(add-to-list 'auto-mode-alist '("\.xul\\'" . nxml-mode))
 
 (eval-after-load 'nxml-mode '(define-key nxml-mode-map [C-return] 'nxml-complete))