Examine source code of Pocket Translator

{
  "manifest_version": 3,
  "name": "Pocket Translator",
  "version": "1.3",
  "description": "A simple pocket translator able to translate any text, show you how to pronounce it and now even built in dark mode!",
  "action": {
    "default_popup": "index.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "generalgoldiez@gmail.com"
    }
  }
}