Examine source code of athenos

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "athenos",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.3)",
      "toolbar_text": "rgb(234, 234, 234)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(127, 108, 157)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(129, 105, 143)",
      "popup": "rgb(35, 27, 45)",
      "popup_text": "rgb(134, 134, 134)",
      "tab_loading": "rgb(129, 105, 143)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{318ad79e-8297-48b2-b68d-bbf5da532694}"
    }
  }
}