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A Simple Containerized Browser

Why I built a single Docker image that gives you an actual tab bar and a live, interactive screen for a headless Chromium instance — no browserless, no VNC.

Developer Tools

Added July 4, 2026 · Last analysed July 4, 2026 · via Hacker News · 50% unique tagline

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 4 July 2026; the live site may have changed since.

A Simple Containerized Browser is partway there, with a thorough launch checklist and clean crawl signals. Main gaps: missing several security headers, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Hacker News on July 4, 2026. The site is hosted on IONOS SE in Germany, with a domain registered 3 months before launch. The crawl picked up 7 technologies on this site, covering ui library, analytics, CSS frameworks, and DNS providers. The stack includes Next.js, React, and Tailwind CSS.

For context, it's on one of the most common stacks we track, shared by 3,304 launches.

If you own this site, refresh the snapshot and see the full fix list any time →

Vibe Score 35 · Some AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (7)

Infrastructure
DNS Cloudflare DNS
Build & Framework
CSS framework Tailwind CSS
Framework React
Meta-framework Next.js (5)
UI library Lucide Icons
shadcn/ui
Analytics & Marketing
Analytics PostHog (5)

Infrastructure

Network
AS8560 · DE
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 18 May 2026 to 16 Aug 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
3 months
Registered Mar 2026 · Cloudflare, Inc.

Email Security

SPF Not published. Your domain can be spoofed in phishing emails.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
DMARC Not published. Receivers fall back to permissive defaults.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (5)

Cookies (1)
NameLifetimeDetected as
ph_phc_z52ZMBsJzEjCcAsjXqBPqnmjgALpQn8a9BfEL9TGJRst_posthog 1y PostHog
Local storage (1)
KeySizeDetected as
ph_phc_z52ZMBsJzEjCcAsjXqBPqnmjgALpQn8a9BfEL9TGJRst_posthog 1.6 KB PostHog
Session storage (3)
KeySizeDetected as
ph_phc_z52ZMBsJzEjCcAsjXqBPqnmjgALpQn8a9BfEL9TGJRst_posthog 299 B PostHog
ph_phc_z52ZMBsJzEjCcAsjXqBPqnmjgALpQn8a9BfEL9TGJRst_primary_window_exists 4 B PostHog
ph_phc_z52ZMBsJzEjCcAsjXqBPqnmjgALpQn8a9BfEL9TGJRst_window_id 38 B PostHog

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description)
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 73 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

Performance How?

410 ms Server response
44% Faster than peers
568 ms Largest contentful paint
0.00 Cumulative layout shift
623 KB Page weight
116 KB Image weight
2 Third-party domains
0 Console errors
0 Failed requests

6 images: 3 oversized, 2 without width/height

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

SignalPoints
AI CSS signals +10
AI copy signals +5
AI palette signals +5
AI writing signals +5
AI stack signals +10

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

AI Stance

Welcomes AI crawlers
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (16 URLs)
security.txt
llms.txt
ads.txt
humans.txt
? Privacy Policy not detected
? Terms of Service not detected
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
Detection works best on English language sites.

Security Headers (0/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

Code splitting
23 JS files
2 CSS files
2 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.