Examine source code of YuiAPI

{
  "manifest_version": 2,
  "name": "YuiAPI",
  "short_name": "YuiAPI",
  "version": "1.1.16",
  "description": "An easy-to-use rest client that helps you test the api",
  "homepage_url": "https://www.yuiapi.com",
  "author": "Yuiitsu",
  "default_locale": "en",
  "background": {
    "scripts": [
      "scripts/lib/jquery-3.4.1.min.js",
      "scripts/app.js",
      "scripts/module/background/module.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://www.yuiapi.com/*",
        "https://www.yuiapi.com/*"
      ],
      "js": [
        "scripts/lib/jquery-3.4.1.min.js",
        "scripts/app.js",
        "scripts/module/content/module.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "YuiAPI",
    "default_icon": "images/yuiapi-logo-32.png"
  },
  "permissions": [
    "cookies",
    "http://*/*",
    "https://*/*"
  ],
  "icons": {
    "16": "images/yuiapi-logo-16.png",
    "48": "images/yuiapi-logo-48.png",
    "128": "images/yuiapi-logo-128.png"
  }
}