Examine source code of Jinx-LoL

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Jinx-LoL",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0.44)",
      "toolbar_text": "rgb(255, 179, 209)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(255, 220, 255)",
      "toolbar_field": "rgba(24, 0, 255, 0.12)",
      "toolbar_field_text": "rgb(249, 97, 249)",
      "tab_line": "rgb(255, 0, 45)",
      "popup": "rgb(45, 2, 45)",
      "popup_text": "rgb(221, 175, 255)",
      "tab_loading": "rgb(255, 0, 45)"
    }
  }
}