firefox: image: selenium/node-firefox-debug ports: - "5555:5555" - "5900:5900" environment: - JAVA_OPTS=-Xmx512m - SCREEN_WIDTH=1024 - SCREEN_HEIGHT=768 - SCREEN_DEPTH=16 - NODE_MAX_INSTANCES=2 - NODE_MAX_SESSION=2 - SE_OPTS=-host 5.6.7.8 -port 5555 - HUB_PORT_4444_TCP_ADDR=1.2.3.4 - HUB_PORT_4444_TCP_PORT=4444 restart: always