Examine source code of Power

{
  "name": "Power",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "background.jpg"
    },
    "colors": {
      "frame": "rgba(194, 194, 194, 1)",
      "tab_background_text": "rgba(17, 80, 120, 1)",
      "bookmark_text": "rgba(17, 80, 120, 1)",
      "toolbar_field": "rgba(17, 80, 120, 1)",
      "toolbar_field_text": "rgba(232, 232, 232, 1)",
      "tab_line": "rgba(17, 80, 120, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a2e9307-492b-4e3d-9a2f-ef2828cdb139}"
    }
  }
}