Examine source code of Animated Left Shark

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Animated Left Shark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(251, 82, 122, 0)",
      "toolbar_field": "rgba(255, 225, 232, 0.75)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 167, 187)",
      "popup": "rgb(255, 167, 187)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 167, 187)",
      "bookmark_text": "rgb(0, 0, 0)",
      "frame": "rgb(170, 228, 253)",
      "tab_background_text": "rgb(0, 0, 0)"
    }
  }
}