extensionstack.com

.com crawl

First seen 2026-04-12 · Last seen 2026-05-10 · ok HTTP/1.1 200 714 ms crawled 2026-05-04

US · 104.21.17.67 · AS13335 Cloudflare, Inc.

Reputation 100/100

Classifying

HTML metadata

Title: Extension Stack - Chrome Extension Starter Kit
Description: The Chrome extension boilerplate to help you build your extension faster than ever
Language: en

Technology

CDN: Cloudflare
CMS: Next.js

Third-party hosts loaded (1)

assets.onedollarstats.com×1

Registration

Registrar

Cloudflare, Inc.

Created

2024-11-19

Expires

2026-11-19 183 days left

Updated

2025-10-20

Name servers

margot.ns.cloudflare.com
shane.ns.cloudflare.com

DNS records live

NS

margot.ns.cloudflare.com
shane.ns.cloudflare.com

MX

12 route2.mx.cloudflare.net
49 route3.mx.cloudflare.net
79 route1.mx.cloudflare.net

TXT

google-site-verification=SYCZTUjmq8CqW2SgJ2YEYkMRv6GSMg_RRjrnJFikZAo
v=spf1 include:_spf.mx.cloudflare.net ~all

Certificate (current)

WE1

from 2026-03-07 to 2026-06-05

Expires in 16 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://extensionstack.com/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=63072000