Examine source code of eBay Seller Scraper

{
  "manifest_version": 2,
  "name": "eBay Seller Scraper",
  "version": "0.1.0",
  "description": "Collect seller listing links and parse item pages with photos, price, shipping, etc.",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "gipermos33@gmail.com"
    }
  },
  "permissions": [
    "storage",
    "downloads",
    "tabs",
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "*://www.ebay.com/*",
    "*://*.ebay.com/*",
    "*://i.ebayimg.com/*",
    "*://*.ebaystatic.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options/eula.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_title": "eBay Seller Scraper",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.ebay.com/sch/*"
      ],
      "js": [
        "content/listing.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.ebay.com/itm/*"
      ],
      "js": [
        "content/item.js"
      ],
      "run_at": "document_idle"
    }
  ]
}