Examine source code of whaleman

{
  "name": "whale",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "whale.jpg"
    },
    "colors": {
      "frame": "rgba(0, 77, 255, 1)",
      "tab_background_text": "rgba(0, 255, 60, 1)",
      "toolbar": "rgba(24, 6, 189, 1)",
      "bookmark_text": "rgba(125, 255, 223, 1)",
      "toolbar_field": "rgba(0, 255, 242, 1)",
      "toolbar_field_text": "rgba(38, 0, 255, 1)",
      "tab_line": "rgba(89, 255, 106, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{938f1d7e-ddb8-491a-b76a-23d8dd771a51}"
    }
  }
}