Examine source code of Mega Shrek

{
  "name": "Mega Shrek",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "download.jpg"
    },
    "colors": {
      "frame": "rgba(61, 61, 61, 1)",
      "tab_background_text": "rgba(28, 33, 26, 1)",
      "toolbar": "rgba(49, 51, 49, 1)",
      "bookmark_text": "rgba(22, 26, 19, 1)",
      "toolbar_field": "rgba(75, 150, 77, 1)",
      "toolbar_field_text": "rgba(48, 102, 16, 1)",
      "tab_line": "rgba(91, 97, 87, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0823ba1d-1580-47f1-8ad9-835700ad9c4a}"
    }
  }
}