Hi Annick,
Firefox is notoriously famous for their handling of HTTP requests. Whenever something works in chrome, you need to be sure it also works in FF.
You may get NS_BINDING_ABORTED when a load on the page is interrupted by something else, typically a page navigation.
How are you redirecting to your new page? Using the ‘show page’ action in a microflow or via JavaScript? You should check if there is still a progress running in the background (maybe a Microflow timer?), before navigating to a new page.
Hope this helps,
Martijn