Examine source code of Shopify Post-purchase DevTools

{
  "manifest_version" : 2 ,
  "name" : "Shopify Post-purchase Developer Tools",
  "version" : "2.0.0",
  "description" : "Adds debugging and convenience tools for developing Shopify's post-purchase extensions",
  "options_ui" : {
    "page": "./build/options/index.html" ,
    "open_in_tab": true
  },
  "default_locale" : "en" ,
  "background" : {
    "scripts" : [
      "./build/backgroundScripts/background.js" 
    ]
  },
  "icons" : {
    "128" : "./images/logo.png"
  },
  "permissions" : [
    "webRequest" ,
    "webRequestBlocking" ,
    "<all_urls>" ,
    "storage" 
  ]
}