Examine source code of Stock Logger

{
  "manifest_version": 2,
  "name": "Stock Logger",
  "version": "4.0.1",
  "description": "Log source pages and their downloaded files into local, exportable project logs.",
  "browser_specific_settings": {
    "gecko": {
      "id": "stock-logger@local.extension",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "downloads",
    "storage",
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Stock Logger — click to log this page",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  }
}