Examine source code of Gloria

{
  "theme": {
    "images": {
      "theme_frame": "mc.jpg"
    },
    "colors": {
      "frame": "#660505",
      "tab_background_text": "#060054"
    }
  },
  "version": "2.0",
  "name": "Gloria",
  "manifest_version": 2,
  "description": "pra quem gosta da banda gloria curte e quer personalizar o firefox com eles.."
}