Examine source code of Banana Blast

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Banana Blast",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-012-1e971c5fbb8dec3acbd76dd6c6819de9.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 227, 113)",
      "toolbar_text": "rgb(129, 102, 30)",
      "frame": "rgb(215, 191, 94)",
      "tab_background_text": "rgb(251, 230, 141)",
      "toolbar_field": "rgb(255, 253, 243)",
      "toolbar_field_text": "rgb(129, 102, 30)",
      "tab_line": "rgb(255, 240, 180)",
      "popup": "rgb(255, 229, 155)",
      "popup_text": "rgb(215, 191, 94)",
      "tab_loading": "rgb(255, 240, 180)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{662b8fe3-32f0-43bc-8e6a-8f487155a441}"
    }
  }
}