Examine source code of Session Manager Pro

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "1.2.4",
  "browser_specific_settings": {
    "gecko": {
      "id": "{033f3a14-72fe-434a-ac10-274be5b2ad3e}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "sidebar_action": {
    "default_icon": "icons/icon16.png",
    "default_title": "__MSG_actionTitle__",
    "default_panel": "popup/popup.html",
    "open_at_install": false
  },
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "permissions": [
    "tabs",
    "storage",
    "alarms",
    "declarativeNetRequest"
  ],
  "action": {
    "default_title": "__MSG_actionTitle__",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_page": "options/options.html",
  "background": {
    "scripts": [
      "background/service-worker.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}