Website readiness profile · Snapshot 23 October 2026
britbox.com
britbox.com's public homepage, certificate and DNS checked against 31 practices and compared with 536 Entertainment & Video Streaming sites.
- Readiness index
- 68/100
- Ahead of
- 69%
- Practices observed
- 18/31
- Popularity band
- Top 50K
Entertainment & Video Streaming median 62
of measured Entertainment & Video Streaming sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: britbox.com. Thin bar: Entertainment & Video Streaming peer median.
Enable
85/100
Peers 80
Harden
69/100
Peers 52
Accelerate
53/100
Peers 60
Recover
0/100
Peers 12
Priority fixes for britbox.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Static files cached for 30 days or more
Observed: A same-site stylesheet or script was cacheable for 365 seconds, short of the 30-day benchmark.
Why it matters: Returning visitors and later page views reuse cached files instead of downloading them again.
What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.
46% of Entertainment & Video Streaming peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
Priority 2 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 2 external scripts without async or defer.
What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.
42% of Entertainment & Video Streaming peers do this.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 3 · Accelerate
Offscreen images lazy-loaded
Observed: The homepage had 57 images and none used loading="lazy".
What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.
54% of Entertainment & Video Streaming peers do this.
Priority 4 · Enable
Social preview image set
Observed: The homepage had no og:image, so shared links may show without a preview image.
What to do: Add Open Graph tags, including og:image with a 1200 x 630 image.
65% of Entertainment & Video Streaming peers do this.
What britbox.com already does well
Practices fewer than half of Entertainment & Video Streaming peers use.
- HSTS kept for at least a yearHSTS with a 730-day max-age covering subdomains.31% of peers
- DMARC policy enforces quarantine or rejectDMARC policy p=reject.31% of peers
- Modern image formats in useWebP or AVIF images detected.32% of peers
What we saw
- Homepage checked
- https://www.britbox.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- DigiCert, 198-day validity, expiring 2027-02-14
- DNS operators
- Amazon Route 53
- HSTS
- max-age 730 days, includeSubDomains, preload
- DMARC policy
- p=reject
- Homepage HTML
- 287 KB, gzip
- Images on homepage
- 57 (svg 1)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 13
- Certificate lifetime of 100 days or less
- CAA records limit who can issue certificates
- DNSSEC signed
- security.txt published
- Content Security Policy present
- Referrer-Policy set
- HTTP/3 advertised
- Static files cached for 30 days or more
- Offscreen images lazy-loaded
- No render-blocking scripts in <head>
- Structured data present
- Social preview image set
- Nameservers spread across providers
Observed 18
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- HTTP/2 negotiated
- HTML compressed
- Modern image formats in use
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
Own britbox.com?
Re-run the checks after a change, or verify the site in a free workspace to save reports with history, compare against similar sites and competitors, and track a private action plan. What owners get.
Live status for this site: Status Is Down: britbox.com. This profile covers configuration only.