The folks at Mozilla use a dedicated
page for their own product line. They also tend to care both about accessibility and bugs.
Here is the actual Search Page for issues, and you choose the product, Firefox in this case, from the Product dropdown.
I can't find anything related to NVDA that appears to be related to the issue being discussed here, but there are 26 open bugs. I have not written a bug/issue report in Bugzilla in ages, so I'd have to read the documentation about how to do so if I wanted to.
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
Any idiot can face a crisis. It's the day-to-day living that wears you out.
~ Anton Chekhov