Examine source code of S3BucketList

{
  "manifest_version": 2,
  "name": "S3BucketList",
  "description": "S3BucketList automatically scans network requests made by your browser to detect Amazon S3 bucket URLs",
  "version": "4.1.2",
  "icons": {
    "16": "icon-16.png",
    "19": "icon-19.png",
    "32": "icon-32.png",
    "38": "icon-38.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "webRequest",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "persistent": true,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Default Popup Title",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a219c9e4-b200-451c-bf53-a9b170b510dd}"
    }
  }
}