Examine source code of Red Inazuma Logo

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Red Inazuma Logo",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 58, 58, 0)",
      "toolbar_text": "rgba(255, 255, 255, 0.48)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgba(0, 0, 0, 0.51)",
      "popup_text": "rgb(207, 207, 207)",
      "button_background_active": "rgb(255, 255, 255)",
      "button_background_hover": "rgba(170, 170, 170, 0)",
      "popup_highlight": "rgba(0, 0, 0, 0)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bf559783-8380-4701-913a-d2a227e1ed40}"
    }
  }
}