Examine source code of SmartShot

{
  "manifest_version": 3,
  "name": "SmartShot",
  "version": "1.0.0",
  "description": "Full-page screenshot to JPG/PNG — 100% local, no account, no data stored, no cloud.",
  "browser_specific_settings": {
    "gecko": {
      "id": "smartshot@joncax.github.io",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "downloads",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "SmartShot"
  },
  "background": {
    "scripts": [
      "src/background/background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "commands": {
    "capture-page": {
      "suggested_key": {
        "default": "Alt+Shift+S",
        "mac": "Alt+Shift+S"
      },
      "description": "Capture full page screenshot"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en"
}