Examine source code of Hawks3

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Hawks3",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(195, 120, 120, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(165, 17, 17)",
      "toolbar_field": "rgba(146, 47, 47, 0.8)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(252, 232, 4)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgba(202, 27, 27, 0.89)",
      "icons": "rgb(252, 232, 4)",
      "ntp_text": "rgb(252, 232, 4)",
      "popup_border": "rgb(252, 232, 4)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_separator": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgba(195, 120, 120, 0)",
      "tab_loading": "rgb(252, 232, 4)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b13f2ac0-f858-461f-bc0c-28ab8cf119d9}"
    }
  }
}