Sorry, I don’t work in marketing. I could Google for an answer if you’d like.
So you do have paid QA staff, you just don’t test in non-default mobile browsers? OK.
Well, given all the open source talk on Boing Boing, I suspect you might have a few Firefox users here. I noticed the bug last year but I didn’t recall an easy public bug database for Discourse so I didn’t report it. I certainly didn’t spend time debugging it. I just learned the site was broken in certain ways and moved on.