Examine source code of Witching by M♥Donna

{
  "name": "Witching by M♥Donna",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(17, 18, 20, 1)",
      "tab_background_text": "rgba(230, 230, 230, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(230, 230, 230, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.08)",
      "toolbar_field_text": "rgba(227, 224, 224, 1)",
      "tab_line": "rgba(227, 224, 224, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c63fd9a5-cb52-43f7-b987-4c6460757c56}"
    }
  }
}