Examine source code of Rock Paper Scissors

{
  "description": "A simple rock paper scissors game made using js!",
  "manifest_version": 2,
  "name": "RPS",
  "version": "1.1resigned1",
  "homepage_url": "https://github.com/paritosh9199/mozillaHackathon",
  "icons": {
    "48": "icons/rps_d48.png",
    "96": "icons/rps_d96.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/rps_d96.png",
    "theme_icons": [
      {
        "light": "icons/rps_l48.png",
        "dark": "icons/rps_d48.png",
        "size": 48
      }
    ],
    "default_title": "RPS",
    "default_popup": "popup/rps.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{455e88da-38b0-4dc7-ba21-f25916c77a12}"
    }
  }
}