Examine source code of Send to ntfy

{
  "manifest_version": 3,
  "name": "Send to ntfy",
  "version": "2.3.3",
  "description": "Send notifications to ntfy.sh with file attachments, priority, and tags",
  "permissions": [
    "activeTab",
    "storage",
    "unlimitedStorage",
    "contextMenus",
    "scripting"
  ],
  "optional_host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "ntfy.js",
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cad379db-edfe-4c5e-b936-27a19156b5dc}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  }
}