Examine source code of Linkirani

{
  "manifest_version": 2,
  "name": "Linkirani",
  "short_name": "Linkirani",
  "version": "1.4",
  "description": "Verify links on linkirani.ir",
  "icons": {
    "48": "assets/logo-48.png"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "webNavigation"
  ],
  "browser_action": {
    "default_icon": "assets/logo.png",
    "default_title": "Linkirani"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}