Examine source code of HackThePlanet

{
  "name": "HackThePlanet",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "hacktheplanet.png"
    },
    "colors": {
      "frame": "rgba(12, 12, 13, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b55517ba-3e76-4e08-931c-0e5fe60d3dd5}"
    }
  }
}