Examine source code of Senza|tomica

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Senza|tomica",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "center top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(184, 184, 184)",
      "frame": "rgb(31, 32, 32)",
      "tab_background_text": "rgb(184, 184, 184)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgb(254, 30, 30)",
      "tab_line": "rgb(254, 30, 30)",
      "popup": "rgb(31, 32, 32)",
      "popup_text": "rgb(251, 25, 25)",
      "tab_loading": "rgb(254, 30, 30)"
    }
  }
}