Examine source code of Links Spy

{
  "manifest_version": 3,
  "name": "Links Spy",
  "version": "1.0",
  "description": "Find broken links and colour-code every link by destination: internal, external, nofollow, redirects, insecure HTTP and dead ends.",
  "author": "Keral Patel",
  "homepage_url": "https://www.keralpatel.com",
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Links Spy",
    "default_icon": {
      "16": "images/icon16.png",
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "shared/categories.js",
      "background.js"
    ]
  },
  "commands": {
    "toggle-highlight": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "Command+Shift+L"
      },
      "description": "Toggle link highlighting on the current page"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "links-spy@keralpatel.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}