Examine source code of French Pastel

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "French Pastel",
  "description": "French Pastel Theme For Firefox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(179, 208, 119)",
      "toolbar_text": "rgb(48, 49, 88)",
      "frame": "rgb(87, 76, 129)",
      "tab_background_text": "rgb(229, 249, 185)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(48, 57, 31)",
      "tab_line": "rgb(49, 75, 39)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(50, 51, 92)",
      "tab_loading": "rgb(49, 75, 39)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "french-pastel@pro-bandey.com"
    }
  }
}