Examine source code of OfferUp Item Search

{
  "manifest_version": 2,
  "name": "OfferUp Item Search",
  "version": "1.0.0",
  "description": "Search OfferUp items without login. Quick, anonymous browsing.",
  "author": "Billy Anderson",
  "homepage_url": "https://github.com/TorranceTech",
  "browser_specific_settings": {
    "gecko": {
      "id": "billy.anderson.it@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "*://offerup.com/*",
    "*://*.offerup.com/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "Search OfferUp",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.offerup.com/*",
        "*://offerup.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}