Examine source code of Nev URL Shortener

{
  "manifest_version": 3,
  "name": "Nev URL Shortener",
  "short_name": "Nev",
  "version": "1.0.0",
  "description": "Free, secure, ad-free URL shortener with link analytics. Shorten the current page in one click. No sign-up.",
  "author": "Nevfar",
  "homepage_url": "https://nev.lt/",
  "icons": {
    "16": "app/16.png",
    "32": "app/32.png",
    "48": "app/48.png",
    "128": "app/128.png"
  },
  "action": {
    "default_title": "Shorten this page with Nev",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "app/16.png",
      "32": "app/32.png",
      "48": "app/48.png",
      "128": "app/128.png"
    }
  },
  "background": {
    "scripts": [
      "api.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "nev@nev.lt",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "cookies",
    "contextMenus",
    "notifications",
    "clipboardWrite"
  ],
  "host_permissions": [
    "https://nev.lt/*"
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; script-src 'self'; object-src 'none'; img-src 'self' https://nev.lt; style-src 'self'; font-src 'self'; connect-src https://nev.lt; base-uri 'none'; frame-src 'none'"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+U",
        "mac": "Command+Shift+U"
      },
      "description": "Open the Nev URL Shortener popup"
    },
    "shorten-and-copy": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Shorten the current page and copy the link"
    }
  }
}