Examine source code of Objectum flag

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "objectum",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(100, 161, 202, 0.2)",
      "toolbar_text": "rgb(59, 135, 185)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(93, 114, 19)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(193, 211, 128)",
      "tab_line": "rgb(255, 0, 3)",
      "popup": "rgb(201, 201, 201)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 0, 3)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0f20a010-9765-4823-a9ea-d24f3d07f067}"
    }
  }
}