Examine source code of Night Shadows by M♥Donna

{
  "name": "Night Shadows by M♥Donna",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(15, 20, 20, 1)",
      "tab_background_text": "rgba(255, 236, 212, 1)",
      "toolbar": "rgba(15, 20, 20, 0)",
      "bookmark_text": "rgba(227, 219, 207, 1)",
      "toolbar_field": "rgba(15, 20, 20, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{53c84883-a6fb-490c-b215-202886d4e5cb}"
    }
  }
}