Examine source code of Discord Accounts Manager

{
  "manifest_version": 2,
  "name": "Discord Account Manager",
  "version": "1.2.6",
  "description": "Firefox desktop only. Personal local manager for your own Discord accounts. Saves tokens in browser storage and switches accounts on Stable, Canary or PTB.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_action": {
    "default_title": "Discord Account Manager",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "cookies",
    "browsingData",
    "*://discord.com/*",
    "*://*.discord.com/*",
    "*://canary.discord.com/*",
    "*://ptb.discord.com/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src 'self' https://cdn.discordapp.com data:;",
  "browser_specific_settings": {
    "gecko": {
      "id": "7c4f2a91-8b3e-4d1f-9a6c-2e8d5f1b0c3a@discord-account-manager",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}