3fils.com website review

Your mobile performance score is 65 (desktop: 98). Pages that score under 90 lose visitors before the first paint.

About 179 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 450 ms faster on a phone.

17 images could be 306 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

4 third-party services load with your homepage (Google Tag Manager, Clarity and Google Analytics and others), adding 207 KiB and 139 ms of main-thread time.

2 files block the first paint until they finish downloading. Deferring or inlining them could save about 150 ms.

5 long tasks block the main thread while loading, the longest for 126 ms. During a long task the page ignores taps.

Polyfills for old browsers add 15 KiB JavaScript that modern phones do not need.

1 file is served with short cache lifetimes, so returning visitors download them again (10 KiB).

Desktop scores 98 but mobile only 65. A gap that wide usually means heavy scripts and images that hit phones hardest.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Your largest element takes 9.5 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “3Fils”.

The page becomes fully interactive after 9.7 s. Good is under 3.8 s.

The first text or image appears after 2.7 s on a phone. Good is under 1.8 s.

Visually, the page fills in at 4.7 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 206 ms in total while the page loads. Good is under 200 ms.

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 110 ms to 112 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' largest content (lcp) went from 2.1 s to 2.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 5.6 MB in 68 requests on a phone: media 4.0 MB (1), scripts 674 KiB (27) and images 624 KiB (19). Under 2 MB keeps phones on slow connections fast.

1 image is downloaded at several times the size a phone draws it, for example logo-3fils white.svg at 656 px wide, shown at 85 px. Resized copies would save about 168 KiB.

2 images (84 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

By the Sustainable Web Design model, a visit to your homepage emits about 1.58 g of CO₂e: 190.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

7 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

There are 3 <h1> headlines (“Making”, “Complex” and “Simple.”). One clear main headline is easier for people and search engines.

No canonical URL, so duplicate versions of the homepage (with or without www, with tracking parameters) can split ranking signals.

No Open Graph image, so links shared on LinkedIn, Slack or Facebook show no preview picture.

The homepage links to 26 pages on 3fils.com and 6 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

There is no /llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

We fetched 10 pages linked from your homepage and read each the way a search engine does.

2 of 7 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

1 error was logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

No Content-Security-Policy header, the main browser-side defence against injected scripts.

Neither X-Frame-Options nor a CSP frame-ancestors policy is set, so any site can embed yours in a frame.

X-Content-Type-Options: nosniff is missing, so browsers may guess file types.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

3fils.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

Social proof on the homepage: 3 testimonial or review blocks. Pairing it with named testimonials or customer logos makes it far more convincing.

The homepage shows no opening hours. If customers visit or call, show when.

There is no form on the homepage, so every lead has to click through to another page first.

There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 835 words of visible text.

3fils.com has no DMARC record, so nothing tells receivers what to do with mail that fails SPF or DKIM. Gmail and Yahoo require DMARC from bulk senders.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Before a visitor clicks anything, the page loads Google Analytics, Google Tag Manager and Microsoft Clarity (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 3 cookies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 8 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.