Examine source code of clickembed link

{
  "manifest_version": 2,
  "name": "clickembed link",
  "version": "2.0.3.1",
  "description": "Shortens URL and adds call to action to link",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "applications": {
    "gecko": {
      "id": "info@clii.xyz",
      "strict_min_version": "49.0"
    }
  },
  "permissions": [
    "storage",
    "cookies",
    "tabs",
    "activeTab",
    "*://*.jquery.com/*",
    "*://*.jvzoo.com/*",
    "*://*.warriorplus.com/*",
    "*://*.clii.xyz/*",
    "*://*.emcodeweb.com/*"
  ],
  "browser_action": {
    "default_title": "Url Shortner & AddCTA",
    "default_icon": "icons/icon-48.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "jquery-3.4.0.min.js",
      "picker.js",
      "bt.js",
      "main.js"
    ]
  },
  "web_accessible_resources": [
    "options.html"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.warriorplus.com/*"
      ],
      "js": [
        "popup.js"
      ]
    }
  ]
}