Examine source code of PokeWordz

{
  "manifest_version": 2,
  "name": "PokeWordz",
  "version": "1.8.2",
  "description": "Save unknown words to list for future self study",
  "permissions": [
    "https://api.pokewordz.com/",
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "64": "images/icon64.png",
    "128": "images/icon128.png"
  },
  "web_accessible_resources": [
    "translate/translate.html"
  ]
}