Examine source code of Starlight Junktion

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Red",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(255, 0, 4)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 0, 3)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 0, 4)",
      "popup": "rgb(255, 0, 0)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 0, 4)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a580b4e-cc07-452d-9049-1cfbc840b3aa}"
    }
  }
}