LNK Bug Finder, the free module that spots what blocks your PrestaShop sales

The module watches the home page, categories, product pages, the cart, the checkout and the pages of payment modules. It keeps PHP fatal errors, pages in 500 error, errors written by your payment modules in the PrestaShop log, an unreachable database, and JavaScript errors from your store's own files. Warnings, browser extensions, scripts from other sites and robots are ignored. The same error seen a thousand times becomes a single problem, with its 7-day counter and its last occurrence; several errors of the same module in the same second form a single incident.

The module follows every click on the “Add to cart” button and waits for your store's answer. A normal refusal, such as insufficient stock, is ignored. A failure is reported with its error code. If the button does not respond at all, the module only reports it after seeing your theme complete at least one add to cart: a theme that handles the cart its own way never triggers a false alert. Your product pages come from a configurator or a customization module? The module spots these pages and offers to watch them in one click.

When a payment module crashes while the checkout is displayed, PrestaShop 8 and 9 remove that payment method from the page without writing anything anywhere. LNK Bug Finder reports a checkout left with no payment method at all, and the errors your payment modules write in the PrestaShop log during the buying path.

Figures measured on the shipped module, gzip-compressed (level 9). On the home page, categories, product pages, cart and checkout: 2.1 KB of JavaScript to watch the add to cart. With speed tracking on: 1.2 KB more, which stops at its first line for visits outside the sample. On every other page: nothing. No style sheet on the store.

The module uses neither jQuery nor any library. A page without errors costs your server no database query. The dashboard reads counters that are already computed.

On a sample of visits (10% by default, adjustable), the module measures Google's Core Web Vitals: largest content displayed (LCP), responsiveness (INP), layout stability (CLS) and first byte received (TTFB), together with your server time. Results are given per page type, over 7 and 30 days. Tracking can be turned off in the settings, and the script is then not loaded at all.

The Extensions tab gives the weight of the files each module loads on the pages of the buying path: JavaScript, style sheets and fonts. It also spots files a module inserts without going through PrestaShop. You see at a glance which module weighs down your product pages the most.

Each problem has a “Get it fixed” button. It shows exactly what will be sent to MonSiteBug: the kind of error, the file, the number of occurrences, the versions of PrestaShop, PHP and your modules. No password, no customer data. Nothing is sent without your agreement, and you confirm the request from your mailbox. Tick up to 10 problems and add a message: everything leaves in a single request. Support in French and English.

The module sets no cookie, does not read the session and records no personal data: no e-mail address, no IP address, no customer or order identifier. Error messages are cleaned before being recorded.

Two versions of the module, one per generation: 1.1 for PrestaShop 1.7.6 to 8.x, 1.9 for PrestaShop 9, with a native page in each back office, under Advanced Parameters. Checked on test stores running PrestaShop 1.7.6, 8.1 and 9.2, with the Classic and Hummingbird themes. No override.