Examine source code of Dark Solo Leveling Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Solo Leveling Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(0, 249, 255)",
      "frame": "rgb(9, 9, 10)",
      "tab_background_text": "rgb(0, 249, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(0, 249, 255)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(0, 249, 255)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{20602434-4cb9-4551-a6f2-1bc6383bd295}"
    }
  }
}