diff --git a/script/ci/before_install.sh b/script/ci/before_install.sh
index c5236b071..bf47e071f 100755
--- a/script/ci/before_install.sh
+++ b/script/ci/before_install.sh
@@ -4,3 +4,7 @@
 envdir="$(readlink -e $(dirname $0))/../env"
 . "$envdir/ruby_env"
 . "$envdir/ensure_right_rubygems"
+
+if [ "$BUILD_TYPE" = "cucumber" ]; then
+  sudo apt-get install -y firefox=16.0
+fi