Examine source code of Paper Whales

{
  "name": "Paper Whales",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(178, 200, 219, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(175, 199, 219, 0.06)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(175, 199, 219, 0.07)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9de72f8-e8b8-4984-868f-d7251dcf1cb7}"
    }
  }
}