use firefox 53

fieg · fieg · commit c02fa6fc7965 · 2017-06-22T22:59:03.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 sudo: false
 
 addons:
-  firefox: latest
+  firefox: 53
 
 before_script:
   - npm install -g bower
