Examine source code of Focus by M♥Donna

{
  "name": "Focus by M♥Donna",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Focus on2.jpg"
    },
    "colors": {
      "frame": "rgba(18, 18, 22, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(19, 19, 23, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(19, 19, 23, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(247, 208, 89, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f90c9f93-1ae6-4983-b162-e3c1d6abab76}"
    }
  }
}