Examine source code of iKeyvaultDev

{
  "author": "iKeyvault",
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_popup": "login.html",
    "default_icon": {
      "32": "images/Fav32.png",
      "48": "images/Fav48.png",
      "64": "images/Fav64.png",
      "128": "images/Fav128.png"
    }
  },
  "content_scripts": [
    {
      "js": [
        "js/jquery-3.2.1.min.js",
        "js/vapi-client.js",
        "js/utils.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Automatically login to your websites",
  "icons": {
    "32": "images/Logo32.png",
    "48": "images/Logo48.png",
    "64": "images/Logo64.png",
    "128": "images/Logo128.png"
  },
  "manifest_version": 2,
  "name": "iKeyvault",
  "permissions": [
    "tabs",
    "cookies",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "short_name": "iKeyvault",
  "version": "2.0.0.0",
  "web_accessible_resources": [
    "manifest.json",
    "images/*.png",
    "images/*.jpg",
    "css/*.css",
    "js/*.js"
  ]
}