Examine source code of ZIP Writer

{
  "version" : "0.1.9",
  "name" : "ZIP Writer",
  "manifest_version" : 2 ,
  "offline_enabled": true,
  "optional_permissions" : [
    "downloads" 
  ],
  "homepage_url" : "https://mybrowseraddon.com/zip-maker.html",
  "description" : "Create zip files via an easy-to-use UI right in your browser!",
  "commands" : {
    "_execute_browser_action": {}
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ],
    "persistent" : false 
  },
  "permissions" : [
    "storage" ,
    "contextMenus" 
  ],
  "browser_action" : {
    "default_title" : "ZIP Writer",
    "default_icon" : {
      "16" : "data/icons/16.png",
      "32" : "data/icons/32.png",
      "48" : "data/icons/48.png",
      "64" : "data/icons/64.png"
    }
  },
  "icons" : {
    "16" : "data/icons/16.png",
    "32" : "data/icons/32.png",
    "48" : "data/icons/48.png",
    "64" : "data/icons/64.png",
    "128" : "data/icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{85c1673e-b16f-49d0-9d14-f098a7113572}"
    }
  }
}