Examine source code of Sub Zero Banner v4

{
  "name": "Sub v3",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "1t.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 0.6)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5d6fbfe6-9bbf-431e-8cae-0e925314e69a}"
    }
  }
}