Examine source code of Minecraft Unspeakable

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Minecraft Unspeakable",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(240, 244, 247, 0.49)",
      "toolbar_text": "rgb(2, 0, 7)",
      "frame": "rgb(9, 85, 237)",
      "tab_background_text": "rgb(1, 18, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.36)",
      "toolbar_field_text": "rgb(28, 29, 2)",
      "tab_line": "rgb(227, 39, 180)",
      "popup": "rgb(18, 226, 78)",
      "popup_text": "rgb(223, 17, 20)",
      "tab_loading": "rgb(227, 39, 180)"
    }
  }
}