Examine source code of Worm World Connect

{
  "manifest_version": 2,
  "name": "Worm World Connect",
  "short_name": "WWC",
  "description": "Conexão de Times e Pessoas",
  "default_locale": "pt_BR",
  "version": "0.0.5",
  "content_scripts": [
    {
      "matches": [
        "https://wormate.io/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "images/favicon64x64.png",
    "default_title": "WORM WORLD - Connect",
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "64": "images/favicon64x64.png",
    "128": "images/favicon128x128.png",
    "192": "images/favicon192x192.png",
    "256": "images/favicon256x256.png",
    "512": "images/favicon512x512.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}