Examine source code of Heart Macarons

{
  "name": "Heart Macarons",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Heart Macarons.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(186, 54, 80, 1)",
      "toolbar": "rgba(255, 255, 255, 0.58)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgba(189, 56, 87, 1)",
      "tab_line": "rgba(214, 64, 99, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3a1d2a76-350a-47c8-96c5-5d89b7349dde}"
    }
  }
}