Examine source code of perpetuitystudy

{
  "name": "perpetuitystudy",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "perpetuitystudy.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(171, 171, 171, 1)",
      "toolbar": "rgba(23, 23, 23, 0.63)",
      "bookmark_text": "rgba(171, 171, 171, 1)",
      "toolbar_field": "rgba(171, 171, 171, 1)",
      "toolbar_field_text": "rgba(23, 23, 23, 0.63)",
      "tab_line": "rgba(171, 171, 171, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7bdb1df7-6514-47c7-aea7-6439af6b5ff3}"
    }
  }
}