Examine source code of iLinks

{
  "name": "iLinks",
  "description": "Choose and open your links with just a click!",
  "version": "2.0.0",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "background": {
    "scripts": [
      "popup.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon16.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs",
    "webNavigation",
    "storage"
  ],
  "manifest_version": 2
}