Examine source code of NicGAG WEB

{
  "name": "NicGAG WEB",
  "developer": {
    "name": "kapodamy",
    "url": "taringa.net/lossles_kapodamy"
  },
  "default_locale": "en",
  "description": "__MSG_description__",
  "manifest_version": 2,
  "version": "0.0.21",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "downloads",
    "*://9gag.com/*"
  ],
  "background": {
    "scripts": [
      "nicgag_loader.js",
      "service.js"
    ]
  },
  "icons": {
    "32": "/icons/icon-32.png",
    "64": "/icons/icon-64.png",
    "128": "/icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://9gag.com/*"
      ],
      "js": [
        "downloads.js"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "nicgag.html",
    "nicgag.webmanifest",
    "*.js",
    "*.css",
    "templates/*.png",
    "splash_screen.svg",
    "templates/*.webm"
  ],
  "applications": {
    "gecko": {
      "id": "NicGAGWEB@kapodamy",
      "strict_min_version": "68.0"
    }
  }
}