Examine source code of e621 Pool Downloader

{
  "manifest_version": 2,
  "name": "e621 Pool Downloader",
  "version": "2.1",
  "description": "Downloads pools from e621.net with organized folder structure and metadata",
  "permissions": [
    "activeTab",
    "downloads",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://e621.net/pools/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icon/e621-icon.png",
      "48": "icon/e621-icon.png",
      "128": "icon/e621-icon.png"
    }
  },
  "icons": {
    "16": "icon/e621-icon.png",
    "48": "icon/e621-icon.png",
    "128": "icon/e621-icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f5a89c7-c2a3-47cf-b3be-1ee6ebd8382f}"
    }
  }
}