DataFirefly Blog — PrestaShop, WordPress & Shopware tips

PrestaShop strikethrough price not showing: the common causes

The promotion shows in the back office but not on the site: the price exists, it just does not reach the display. The ten causes in order of frequency and a five-step diagnostic method.

7 September 2026 5 min read

E-commerce SEO

How to split PrestaShop combinations into separate products

A garment size is chosen after the buying decision, a sofa colour is searched for by name on Google. The five criteria that justify splitting, what you lose in the process, and the seven-step procedure with its redirects.

6 September 2026 4 min read

Conversion and UX

How to reorder the products in a PrestaShop category with drag and drop

Moving a product from position 40 to position 2 takes thirty-eight clicks in the native back office. How PrestaShop stores positions, what silently overwrites them, and which criteria should drive the order of a grid.

6 September 2026 4 min read

Conversion and UX

Semantic search on PrestaShop: how it works and how to roll it out

Matching "car charger" with "cigarette lighter adapter" without declaring a single synonym: the principle, what to vectorise, and above all why you should combine it with your existing search rather than replace it.

5 September 2026 4 min read

Performance and Core Web Vitals

Migrating from PrestaShop 8 to PrestaShop 9: the module audit

A major upgrade is not decided by the PrestaShop core but by your modules. The inventory to produce before any quote, the four treatment categories, the common technical breakages and the journey-based test plan.

5 September 2026 5 min read

Performance and Core Web Vitals

GA4 e-commerce on PrestaShop: the 7 events to wire up

A shop that only sends the purchase has a revenue figure and nothing else. The seven events that rebuild the chain, the item structure to hold everywhere, the classic mistakes and the normal gap with the back office.

4 September 2026 5 min read

Conversion and UX

PrestaShop accessibility and the EAA: what an online shop must check

The EAA has applied since June 2025 and explicitly covers e-commerce. Who is really concerned, the twelve blockers that come back on every shop, a one-day audit method and what a widget cannot do.

4 September 2026 5 min read

Conversion and UX

E-commerce internal linking: from categories to product pages

The downward flow from category to products happens by itself. The upward flow, the one that makes your category pages exist, is almost always missing. The four flows to build, the anchor rules and what really automates.

3 September 2026 5 min read

PrestaShop Tutorials

How to manage use-by dates, best-before dates and lot numbers in PrestaShop

The date does not belong to the product, it belongs to the lot: that is what breaks naive implementations. Distinguishing use-by dates, best-before dates and lot numbers, the FEFO rule in preparation, and what makes a targeted product recall possible.

3 September 2026 5 min read

PrestaShop Tutorials

How to automatically verify a VIES VAT number at PrestaShop checkout

One call, one valid-or-invalid answer: in production you must handle three states, not two. Number formats per country, latency that varies with the member state queried, behaviour when the service is down and keeping the proof.

2 September 2026 5 min read

Conversion and UX

How to display PrestaShop customer reviews with stars in Google

Reviews a business displays about itself no longer produce stars: only product reviews remain eligible. The two markup structures to articulate, Google's five rules, the mistakes that make rich snippets disappear and why the waiting period is normal.

2 September 2026 5 min read

Conversion and UX

Renting out equipment with PrestaShop: calendar and availability management

A rented product is not unavailable, it is unavailable from the 12th to the 18th. The interval-based availability model, the four durations to distinguish including the one everyone forgets, and the usability rules for the customer-facing calendar.

1 September 2026 5 min read

Articles