Debug¶

The Debug page lets you enable a log of all Conversions API events sent by the module. This is useful during setup to verify that events are being dispatched correctly.

Debug

Enabling debug mode¶

Toggle Enable Debug Mode to ON and save. The module will begin logging all CA event payloads and responses to its log file.

Warning

Debug mode generates a log entry for every CA event on every page load. On a busy store this will produce a large log file quickly. Enable it only during active debugging and disable it when done.

Reading the log¶

The log viewer shows the tail of the current log file, along with its line count and size.

Each log entry has the format:

+INFO+ v9.0.0 2026/05/25 - 16:12:08: {
    "Request": [
        {
            "event_name": "AddToCart",
            "event_time": 1779718328,
            "event_source_url": "https://shop1.local/it/carrello",
            "event_id": "177971832B6a1458b8567268.96384063",
            "user_data": {
                "external_id": ["dad99799cf17..."],
                "client_ip_address": "172.217.20.251",
                "client_user_agent": "Mozilla/5.0 ...",
                "fbc": "fb.1.177786500...",
                "fbp": "fb.1.177948902..."
            },
            "custom_data": {
                "value": 35.0384,
                "currency": "eur"
            }
        }
    ]
}

Key fields to verify:

Field	What to check
`event_name`	Correct event type for the action
`event_id`	Present and non-empty (used for deduplication)
`client_ip_address`	Customer's IP is captured
`fbp`	`_fbp` cookie value is present
`fbc`	`_fbc` cookie value is present (if user clicked a Facebook ad)
`value` / `currency`	Correct for the event type

Clearing the log¶

Click Clear logs to delete the current log file and start fresh.

Log file location¶

The log file is written to modules/fabfacebookpixel/var/logs/ inside your PrestaShop installation directory.