Examine source code of Discord Token Login

{
  "manifest_version": 3,
  "name": "Discord Token Login",
  "short_name": "LHTokenLogin",
  "version": "1.0.1",
  "author": "Last Head",
  "description": "Lightweight extension that allows to login using Discord token, copy current accounts' token, and manage multiple accounts via tokens.",
  "icons": {
    "128": "logo.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": "logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "discord-token-login@lasthead.com",
      "strict_min_version": "120.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "scripting",
    "activeTab"
  ],
  "host_permissions": [
    "http://*.discord.com/*",
    "https://*.discord.com/*"
  ]
}