DataFirefly Blog — PrestaShop, WordPress & Shopware tips

How to automate B2B unpaid invoice reminders on PrestaShop

On a B2B store that accepts bank transfer, outstanding receivables build up quietly. Here is a four-step dunning sequence, the statements your invoices must carry, and the point where manual follow-up stops being viable.

14 August 2026 4 min read

Performance and Core Web Vitals

PrestaShop Cache Strategy 2026: Redis, Memcached, Varnish — Which Stack for Which Store

TTFB at 800 ms, LCP at 3.2 s, saturated Google crawl budget: on an unoptimized PrestaShop store, cache is the highest-ROI optimization in 2026 — and the most poorly done. The four layers of a clean stack, the Redis / Memcached / Varnish decision rule, and the default stack recommended for 80% of mid-market stores.

14 August 2026 7 min read

Conversion and UX

How to create a buy 3 get 1 free promotion on PrestaShop

PrestaShop cart rules know how to give a product away, but not how to repeat the offer for every batch of three, nor how to display it on the product page. Here is what the native engine covers, where it stops, and how to build an X for Y mechanic that survives production.

14 August 2026 6 min read

Conversion and UX

Server-side tracking GA4 on PrestaShop: recovering 20 to 35% of conversions after iOS 17 and Consent Mode v2

Between PrestaShop back-office orders and GA4 conversions, the gap is 20 to 35% in 2026. Combined effect of iOS 17, Consent Mode v2, third-party cookie blocking and anti-tracking extensions. Server-side tracking restores 70 to 90% of those conversions and stabilises Meta/Google ROAS. Architecture, cost and real ROI.

13 August 2026 7 min read

AEO and Answer Engines

AI shopping agents: preparing your PrestaShop catalogue for Operator, Claude Computer Use and comparison agents in 2026

Operator, Claude Computer Use, ChatGPT Shopping, Perplexity Buy: AI agents already account for 2 to 8% of referrer traffic on mid-market stores in 2026. How an agent actually reads a product page, and the 8-point checklist to make a PrestaShop catalogue discoverable by agents and their users.

9 August 2026 7 min read

Conversion and UX

Express payment in 2026: Apple Pay, Google Pay, Klarna — UK adoption and conversion impact on PrestaShop

Apple Pay, Google Pay, PayPal Express, Klarna: express payment is the most measurable checkout conversion lever in 2026 (+8 to +18 points). State of UK adoption, conversion gap per payment method, and the three placements to stack on PrestaShop.

5 August 2026 7 min read

Conversion and UX

Return policy that converts: free vs paid returns, the real ROI calculation on PrestaShop in 2026

"Free returns 30 days" vs "Returns at your expense within 14 days": the difference is not marketing. A return policy is a measurable conversion lever whose ROI can be calculated. Here is the worked figure on a UK fashion store (+£10,900/month net) and the parameters of a policy that converts without bleeding margins.

1 August 2026 7 min read

E-commerce News

Transactional email deliverability 2026: strict DMARC, BIMI and why your confirmations end up in spam

"We took a payment, the customer didn't receive the confirmation." The most frequent support ticket in 2026 is almost always a deliverability issue, not a bug. Since Gmail/Yahoo February 2024, strict DMARC and BIMI have become the new standard. The complete roadmap for an e-commerce store.

24 July 2026 7 min read

AEO and Answer Engines

Schema.org Product in 2026: what is required, what is recommended, and where to declare returns and shipping

Only five properties are required for product result eligibility. hasMerchantReturnPolicy and shippingDetails are enhancements, best declared at Organization level. What the Google documentation actually says, and how to apply it on PrestaShop 8/9 and WooCommerce.

20 July 2026 10 min read

E-commerce News

WCAG 2.2 and the European Accessibility Act: where PrestaShop compliance stands one year after enforcement

The European Accessibility Act took effect on 28 June 2025. One year later, most PrestaShop stores serving European customers are still non-compliant. Here is the actual legal framework, the penalties being applied across the EU, and the WCAG 2.2 audit checklist to reach compliance without rebuilding the theme.

16 July 2026 8 min read

Conversion and UX

PrestaShop 8 internal search in 2026: why the native engine sabotages your sales (and how to measure the cost)

15 to 30% of visitors go through the search bar, with a purchase intent 2 to 5 times higher than average. And PrestaShop's native search doesn't serve them. Here's how to quantify the cost and what a well-built live search changes.

12 July 2026 8 min read

Conversion and UX

Price + back-in-stock alerts on PrestaShop: recovering the deferred revenue most stores let slip away

"Too expensive" and "Out of stock" are two of the main causes of pre-basket abandonment. Without capture, the revenue is lost. With two clean alert modules (price + stock), stores capture 3 to 8% of net additional revenue. Complete mechanics.

8 July 2026 8 min read

Articles