Update firefox ext

diff --git a/firefox b/firefox
index f76b13b..87a06b9 160000 (submodule)
--- a/firefox
+++ b/firefox
@@ -1 +1 @@
-Subproject commit f76b13baadd325324178a7a6a9c45b157186c08e
+Subproject commit 87a06b9840b66cb9aaf877b5e8e701c4b02a3108