language: node_js             # <1>
node_js: {nodeCurrentVersion}                   # <2>

addons:
  firefox: latest             # <3>

env:
  - MOZ_HEADLESS=1            # <4>

script: npm run test:browser -- --browsers Firefox

env:
  BROWSER_STACK_USERNAME: "$BROWSER_STACK_USERNAME"       # <5>
  BROWSER_STACK_ACCESS_KEY: "$BROWSER_STACK_ACCESS_KEY"