Examine source code of Spring cherry

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Spring cherry",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 137, 194, 0.5)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(255, 125, 184)",
      "tab_background_text": "rgb(113, 54, 15)",
      "toolbar_field": "rgb(255, 238, 241)",
      "toolbar_field_text": "rgb(113, 54, 15)",
      "tab_line": "rgb(255, 250, 135)",
      "popup": "rgb(255, 217, 223)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 250, 135)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c720f09-d17e-4842-b15b-723f502010a7}"
    }
  }
}