Examine source code of SEO Unmasked

{
  "manifest_version": 3,
  "name": "SEO Unmasked",
  "version": "1.4.1",
  "description": "The anti-BS, offline SEO analyzer that exposes raw page data instantly.",
  "default_locale": "en",
  "icons": {
    "16": "icons/custom-icon.png",
    "48": "icons/custom-icon.png",
    "128": "icons/custom-icon.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/custom-icon.png",
      "48": "icons/custom-icon.png",
      "128": "icons/custom-icon.png"
    },
    "default_title": "SEO Unmasked"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js",
        "content/sticky-inject.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "optional_permissions": [
    "scripting"
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "web_accessible_resources": [
    {
      "resources": [
        "dashboard/*",
        "popup/popup.html",
        "popup/popup.js",
        "popup/styles.css",
        "icons/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d50c6cb5-8f8a-4f2a-9c7e-3b2a1f5e6d8b}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}