Examine source code of Discord Token Login

{
  "browser_action": {
    "default_icon": "logo.png",
    "default_popup": "popup/index.html"
  },
  "background": {
    "scripts": [
      "ExtPay.js",
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "http://*.discord.com/*",
        "https://*.discord.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Easy discord login with your Token!",
  "icons": {
    "128": "logo.png"
  },
  "manifest_version": 2,
  "name": "Discord Token Login",
  "version": "1.2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{78bb34e7-f4b1-4500-a426-191daa71fdb9}"
    }
  }
}