Examine source code of Evolution

{
  "name": "Evolution",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "evolution2.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 196, 255, 1)",
      "toolbar": "rgba(0, 43, 255, 0.2)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 89, 166, 0.3)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(0, 166, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5a58c706-3f52-4f52-8f06-58730489d70e}"
    }
  }
}