Examine source code of Simple Screenshot

{
  "manifest_version": 3,
  "name": "Simple Screenshot",
  "version": "1.0.2",
  "description": "One click to capture any tab. Saves to your Downloads folder. No account.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "downloads",
    "notifications"
  ],
  "optional_host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Simple Screenshot — click to capture (Alt: copy, Shift: full page)",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "commands": {
    "capture-visible": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+Shift+S"
      },
      "description": "Capture the visible part of the current tab"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-screenshot@extendforge.com",
      "strict_min_version": "126.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}