Examine source code of Mousher!

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Mousher!",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-y"
      ]
    },
    "colors": {
      "toolbar": "rgb(21, 27, 31)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 12, 19)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(61, 12, 54)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(245, 14, 210)",
      "popup": "rgb(81, 6, 70)",
      "popup_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(13, 0, 13)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(97, 3, 97)",
      "tab_loading": "rgb(245, 14, 210)"
    }
  }
}