Examine source code of Calculator Pro

{
  "manifest_version" : 3 ,
  "name" : "Calculator Pro",
  "version" : "1.1.0",
  "description" : "A beautiful, comprehensive calculator for students and scientists — simple and advanced scientific modes, right in your sidebar.",
  "author": "Mo",
  "homepage_url" : "https://github.com/",
  "icons" : {
    "16" : "icons/icon-16.png",
    "32" : "icons/icon-32.png",
    "48" : "icons/icon-48.png",
    "96" : "icons/icon-96.png",
    "128" : "icons/icon-128.png"
  },
  "sidebar_action": {
    "default_title" : "Calculator Pro",
    "default_panel": "sidebar/sidebar.html",
    "default_icon" : {
      "16" : "icons/icon-16.png",
      "32" : "icons/icon-32.png",
      "48" : "icons/icon-48.png",
      "96" : "icons/icon-96.png",
      "128" : "icons/icon-128.png"
    },
    "open_at_install": false
  },
  "permissions" : [
    "storage" 
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "calculator-pro@mo.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}