diff --git a/.travis.yml b/.travis.yml
index c873c1cb61..121ea3f327 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ before_script:
   - export CHROME_BIN=$PWD/out/chrome-linux/chrome
 
 addons:
-  firefox: "latest"
+  firefox: "latest-esr"
 
 script:
   - npm run pretest