diff --git a/pyro.md b/pyro.md
index 7ebad89db..c969ac53a 100644
--- a/pyro.md
+++ b/pyro.md
@@ -3,6 +3,7 @@
 - a [[person]]
   - [[coder]]
   - [[go]] https://piro.sakura.ne.jp/xul/xul.html
+  - [[extensions]] https://addons.mozilla.org/en-US/firefox/user/9480/
 
 
 [//begin]: # "Autogenerated link references for markdown compatibility"