Examine source code of Check US Visa Slots

{
  "manifest_version": 3,
  "name": "Check US Visa Slots - USVisaScheduling",
  "version": "4.6.5.1",
  "description": "This checkvisaslots.com's extension will provide access to check & share the US visa slots availability.",
  "homepage_url": "https://checkvisaslots.com/",
  "background": {
    "scripts": [
      "js/sw.js"
    ]
  },
  "action": {
    "default_icon": {
      "32": "img/32.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "24": "img/24.png",
    "32": "img/32.png",
    "64": "img/64.png",
    "128": "img/128.png",
    "256": "img/256.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.usvisascheduling.com/*/*",
        "https://atlasauth.b2clogin.com/*"
      ],
      "js": [
        "js/html2canvas.js",
        "js/content.js"
      ],
      "css": [
        "css/sidebar.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://atlasauth.b2clogin.com/*"
      ],
      "js": [
        "js/sidebarl.js"
      ],
      "css": [
        "css/sidebar.css"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "popup.html"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "checkvisaslots@addon",
      "strict_min_version": "109.0"
    },
    "gecko_android": {
      "strict_min_version": "68.0"
    }
  }
}