Examine source code of BF WWC Calculator

{
  "manifest_version": 3,
  "name": "BF WWC Calculator",
  "version": "0.1.2",
  "description": "A quick way to calculate your WWC",
  "icons": {
    "16": "img/logo-16.png",
    "32": "img/logo-32.png",
    "48": "img/logo-48.png",
    "96": "img/logo-96.png",
    "128": "img/logo-128.png"
  },
  "permissions": [
    "storage",
    "clipboardWrite"
  ],
  "action": {
    "default_title": "WWC Calculator",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e63475d-7656-4e36-bd2b-34a4b7898a66}"
    }
  }
}