diff --git a/.circleci/config.yml b/.circleci/config.yml
index cfc657a22..ce38fca27 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -128,6 +128,7 @@ jobs:
           key: dependency-cache-firefox
           paths:
             - firefox
+            - firefox-58.0.tar.bz2
 
   prep-build:
     docker: