Code works in local docker but not in CI runner. Adding debug code

.gitlab-ci.yml

@@ -2,6 +2,8 @@ image: centos:latest
 
 variables:
     NPM_TOKEN: SECURE
+    FIREFOX_BIN: /usr/bin/firefox
+    NO_PROXY: 'localhost, 0.0.0.0/4201, 0.0.0.0/9876'
 
 stages:
     - test
@@ -17,10 +19,11 @@ test:all:
         - wget -O firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-latest&os=linux64&lang=en-US"
         - tar vjxf firefox.tar.bz2
         - rm -rf /usr/bin/firefox
-        - ln -s /firefox/firefox /usr/bin/firefox
-        - export FIREFOX_BIN=/usr/bin/firefox
+        - ln -s /firefox/firefox $FIREFOX_BIN
         - npm install
+        - export
         - npm test
+        - firefox -headless
 
 release:npm:
     stage: release