Examine source code of Modern Fox Looking

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Modern Fox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(16, 34, 98)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(29, 17, 53)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(70, 44, 118)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(245, 58, 98)",
      "popup": "rgba(29, 17, 53, 0.86)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(245, 58, 98)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{516bddad-a1cb-432f-bf3a-0b5eaa20c235}"
    }
  }
}