I've been thinking the same thing. I was told (earlier in this thread) to do the exact steps you describe because Quickbooks insists on using HTML5 features which aren't supported on all browsers. Its not a good first impression for a customer when you send an invoice and they have these issues. We don't have control over the browser clients open link through, and for me the client doesn't have control over this either. I work in schools where installing a different browser on a machine is not possible.

Quickbooks need to have it plastered all over their site that the browser being used isn't supported, or maybe do something simpler like a plain text page if an unexpected browser is detected. The current situation is completely unacceptable for software designed for businesses and professionals to use.

I like how quickbooks don't use their own system to ask us to pay them or send receipt of payment. I think they know we'd have trouble opening it and paying them!