Examine source code of Tempy Email

{
  "manifest_version": 3,
  "name": "__MSG_ext_name__",
  "version": "1.0.26",
  "description": "__MSG_ext_description__",
  "default_locale": "en",
  "permissions": [
    "contextMenus",
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://tempy.email/api/*"
  ],
  "background": {
    "scripts": [
      "background/service-worker.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "__MSG_action_title__",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@tempy.email",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}