Examine source code of Amerika Flag

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Amerika Flag",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 0, 0)",
      "toolbar_text": "rgb(255, 224, 0)",
      "frame": "rgb(0, 85, 251)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(233, 255, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_hover": "rgb(6, 162, 241)",
      "frame_inactive": "rgb(36, 214, 78)",
      "icons_attention": "rgb(5, 74, 222)",
      "icons": "rgb(196, 244, 0)",
      "ntp_background": "rgb(2, 43, 105)",
      "tab_loading": "rgb(233, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f68b708a-3daf-4208-b8b6-425337ea381d}"
    }
  }
}