Examine source code of MaskAnime

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "aster",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(7, 15, 36, 0.5)",
      "toolbar_text": "rgb(255, 5, 5)",
      "frame": "rgb(2, 9, 22)",
      "tab_background_text": "rgb(133, 157, 217)",
      "toolbar_field": "rgb(214, 221, 229)",
      "toolbar_field_text": "rgb(14, 15, 48)",
      "tab_line": "rgb(255, 5, 5)",
      "popup": "rgb(12, 24, 45)",
      "popup_text": "rgb(133, 157, 217)",
      "ntp_background": "rgb(28, 28, 44)",
      "toolbar_vertical_separator": "rgba(34, 25, 77, 0)",
      "tab_loading": "rgb(255, 5, 5)"
    }
  }
}