Examine source code of Coupon Booklet

{
  "developer": {
    "name": "Martin Giger",
    "url": "https://humanoids.be"
  },
  "homepage_url": "https://github.com/freaktechnik/coupon-booklet",
  "manifest_version": 3,
  "version": "1.2.4",
  "name": "__MSG_extensionName__",
  "icons": {
    "96": "coupon-booklet.svg"
  },
  "action": {
    "default_icon": "coupon-booklet.svg",
    "default_title": "__MSG_extensionName__",
    "default_popup": "booklet.html"
  },
  "commands": {
    "__execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+B"
      },
      "description": "__MSG_shortcut__"
    }
  },
  "permissions": [
    "clipboardWrite",
    "unlimitedStorage",
    "tabs",
    "alarms"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "coupon-booklet@humanoids.be",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "134.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "default_locale": "en"
}