manifest.json

{
  "manifest_version": 2,

  "name": "FingInfo",
  "description": "Returns details about the selected word",
  "version": "1.0",

  "browser_action": {
    "default_popup": "index.html",
    "default_icon": "img/finger.png"
  },
  "permissions": [
   "tabs",
   "<all_urls>",
    "https://ajax.googleapis.com/"
  ],
  
 "content_security_policy": "script-src 'self' https://en.wikipedia.org/w/api.php; object-src 'self'", 
  
  "content_scripts": [
    {
    "all_frames": false,
    "matches": ["<all_urls>"],
    "run_at": "document_start",
     "all_frames": true,
    "exclude_matches": [],
      "js": [
        "js/jquery.js",
        "js/jquery.wikiblurb.js",
        "js/selection.js"
      ]
    }
  ]
}