Examine source code of sunlight & forest

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "forest",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(174, 215, 185)",
      "toolbar_text": "rgb(1, 94, 29)",
      "frame": "rgb(242, 243, 231)",
      "tab_background_text": "rgb(60, 34, 0)",
      "toolbar_field": "rgb(252, 253, 239)",
      "toolbar_field_text": "rgb(0, 98, 31)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(252, 253, 239)",
      "popup_text": "rgb(1, 91, 28)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{09460bec-4608-4054-9748-6888c47d2ec3}"
    }
  }
}