Examine source code of Hexagons by M♥Donna

{
  "name": "Hexagons by M♥Donna",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Hexagons.jpg"
    },
    "colors": {
      "frame": "rgba(0, 82, 114, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 80, 117, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 80, 117, 0.04)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6b4446ec-85b7-4cec-9f4f-aa45c76a6fcd}"
    }
  }
}