Examine source code of planet2thrive

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "new planet",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(49, 15, 79)",
      "toolbar_text": "rgb(235, 209, 175)",
      "frame": "rgb(2, 49, 101)",
      "tab_background_text": "rgb(200, 245, 244)",
      "toolbar_field": "rgb(222, 210, 234)",
      "toolbar_field_text": "rgb(4, 88, 184)",
      "tab_line": "rgb(252, 196, 255)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(98, 102, 183)",
      "tab_loading": "rgb(252, 196, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8772e1aa-b5f0-4146-9c52-5b36dd47c860}"
    }
  }
}