Only on firefox I can’t select options, on the product page of my website

Hi @2btechadm

Seem you turned off the checkbox, I see the quantity input only https://www.screencast.com/t/VJMihoKcbZJO

Please also check the products in the group are private or not. If a product is private, you can’t be purchased on the browser where you didn’t log in (Firefox in your case).

There is another point which is, on the product page the quantity bar is with two arrows (Reference image: https://snipboard.io/RBSkjZ.jpg), which on the chorme and on the edge does not have, that only on firefox has. I would like to remove.

Please add below CSS code to WP-Admin → Appearance → Customize → Additional CSS:

.woosg-qty .qty {
    -moz-appearance: textfield;
}