Examine source code of savably

{
  "name": "savably: Shoppen wie immer, bares Geld sparen",
  "short_name": "savably",
  "version": "1.1.0.0",
  "description": "Du shoppst wie gewohnt online, savably sucht die besten Gutschein-Codes für dich. So sparst du maximal bei minimalem Aufwand.",
  "author": "Webgears",
  "manifest_version": 2,
  "default_locale": "de",
  "permissions": [
    "tabs",
    "storage",
    "management",
    "cookies",
    "unlimitedStorage",
    "<all_urls>",
    "alarms"
  ],
  "background": {
    "scripts": [
      "bg/bundle.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "content/bundle.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-128.png"
    },
    "default_popup": "popup.html",
    "default_title": "savably"
  },
  "icons": {
    "16": "icons/icon-128.png",
    "32": "icons/icon-128.png",
    "48": "icons/icon-128.png",
    "128": "icons/icon-128.png"
  },
  "web_accessible_resources": [
    "content/*.css",
    "content/*.svg",
    "images/*.png",
    "/*.*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fce26393-351a-41ca-a36f-1fc472bfed8e}"
    }
  }
}