v0.6.6a2

Added

• Xvfb virtual display support for Docker / Zyte
  On Linux without a $DISPLAY, the browser engine now automatically starts
  Xvfb :99 before launching Chrome. This lets Chrome run in non-headless mode
  against a virtual framebuffer — identical to a real desktop session — which is
  significantly harder for anti-bot systems to detect than --headless=new.
  Falls back to headless silently if Xvfb is not installed.
  Requires apt-get install -y xvfb in your Docker image.