What could be the reason for a link being clickable only once in Firefox and appearing as normal text afterwards?

The reason for a link being clickable only once in Firefox and appearing as normal text afterwards could be due to the browser caching the link's state. To solve this issue, you can add a random query parameter to the link URL each time it is clicked, forcing the browser to treat it as a new link.

<a href="example.com/page.php?random=<?php echo uniqid(); ?>">Click me</a>