Examine source code of Geometric Summer

{
  "name": "Light Summer",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "background-5074889_640.jpg"
    },
    "colors": {
      "frame": "rgba(133, 201, 237, 1)",
      "tab_background_text": "rgba(115, 240, 238, 1)",
      "toolbar": "rgba(72, 202, 242, 1)",
      "bookmark_text": "rgba(207, 12, 12, 1)",
      "toolbar_field_text": "rgba(207, 12, 12, 1)",
      "tab_line": "rgba(146, 190, 235, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{034a6cc8-ecd0-4646-9be2-422f6ccc8faf}"
    }
  }
}