Examine source code of Cache - Fast site loader

{
  "description": "Personal assistant addon to cache static files and make site loads faster.",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/extension.js",
        "js/inlinedisplay.js",
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{71df3f84-4375-4aa5-b52c-f1071ccb7c62}"
    }
  },
  "name": "Cache statics",
  "icons": {
    "16": "img/icon128.png",
    "48": "img/icon128.png",
    "128": "img/icon128.png"
  },
  "manifest_version": 3,
  "host_permissions": [
    "<all_urls>"
  ],
  "version": "0.61",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Popup",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "scripting",
    "declarativeNetRequest",
    "<all_urls>"
  ]
}