Examine source code of PonsLookUp

{
  "manifest_version": 2,
  "name": "PonsLookUp",
  "version": "3.0",
  "description": "Adds a context menu item to search for a selected word in the PONS online dictionary. Clicking the menu item opens a new tab with the search results.",
  "default_locale": "en",
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage"
  ],
  "icons": {
    "16": "icons/LogoArtboard116.png",
    "32": "icons/LogoArtboard132.png",
    "48": "icons/LogoArtboard148.png",
    "96": "icons/LogoArtboard196.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_security_policy": "script-src 'self' ; object-src 'self'"
}