Examine source code of Accesserty DevCheck

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "1.3.2",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "devcheck@accesserty.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "permissions": [
    "tabs",
    "scripting",
    "storage"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "axe.min.js",
        "axe-locale-zh-tw.json",
        "injector.js",
        "pdf.worker.min.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js",
        "structure-overlay.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_page": "options.html"
}