Examine source code of Nature(Nahid14)

{
  "name": "Nature",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "morning crop.jpg"
    },
    "colors": {
      "frame": "rgba(94, 49, 9, 1)",
      "tab_background_text": "rgba(217, 208, 31, 1)",
      "toolbar": "rgba(59, 52, 7, 1)",
      "bookmark_text": "rgba(163, 128, 128, 1)",
      "toolbar_field": "rgba(212, 189, 189, 1)",
      "toolbar_field_text": "rgba(38, 32, 32, 1)",
      "tab_line": "rgba(115, 97, 5, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f05bd85a-5de9-42ea-b7d0-23064d45fd50}"
    }
  }
}