Examine source code of Discord Translate

{
  "manifest_version": 3,
  "name": "Discord Translate",
  "version": "1.0.1",
  "description": "Translate Discord messages",
  "browser_specific_settings": {
    "gecko": {
      "id": "denizen@local.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "personalCommunications"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://discord.com/*",
    "https://ptb.discord.com/*",
    "https://canary.discord.com/*",
    "https://translate.google.com/*",
    "https://translate-pa.googleapis.com/*"
  ],
  "background": {
    "scripts": [
      "service-worker.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://discord.com/*",
        "https://ptb.discord.com/*",
        "https://canary.discord.com/*"
      ],
      "js": [
        "content/common.js",
        "content/incoming.js",
        "content/composer.js",
        "content/index.js"
      ],
      "css": [
        "content/styles.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "action": {
    "default_title": "Discord Translate",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  }
}