Examine source code of Mango

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Mango",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-010-e9f94a3e61666a4c7677eb9cce17d854.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 207, 84)",
      "toolbar_text": "rgb(255, 0, 114)",
      "frame": "rgb(255, 195, 43)",
      "tab_background_text": "rgb(220, 0, 79)",
      "toolbar_field": "rgb(0, 10, 68)",
      "toolbar_field_text": "rgb(255, 231, 245)",
      "tab_line": "rgb(255, 0, 141)",
      "popup": "rgb(255, 229, 138)",
      "popup_text": "rgb(11, 0, 88)",
      "tab_loading": "rgb(255, 0, 141)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7142a7ea-4f19-497e-8780-922b6797dcc5}"
    }
  }
}