Examine source code of linki.ai

{
  "name": "linki.ai",
  "description": "Create short link in one click!",
  "version": "1.6.3",
  "manifest_version": 2,
  "icons": {
    "16": "/images/linki-16.png",
    "32": "/images/linki-32.png",
    "48": "/images/linki-48.png",
    "128": "/images/linki-128.png"
  },
  "permissions": [
    "cookies",
    "tabs",
    "<all_urls>"
  ],
  "host_permissions": [
    "http://linki.ai/",
    "*://*/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/linki-16.png",
      "32": "/images/linki-32.png",
      "48": "/images/linki-48.png",
      "128": "/images/linki-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5914f5cf-4e13-404c-8d77-ce9a19cab6bc}"
    }
  }
}