I did try adding a shirt to the cart and yeah, it added the wrong size. I’d have to switch to chrome to successfully complete an order at the moment. It’s unfortunate, but as long as they’re trying to fix it I don’t see any point in feeling outraged.

As a software developer, if just trying to add a single item to a cart is buggy, then that's definitely something to feel outraged about, software development wise (not literally outraged, but definitely a strong "WTF!?" response).

It's actually really amazing that a bug would manifest in one browser and not another, when just adding an item to a cart. You have to work really hard to make something like that not work correctly.