SuperUser Browser Compatibility on Windows 10? [migrated]

I posted a question using the latest Firefox on my Windows 10 machine. I saw I had replies. When I clicked my inbox, instead of showing my messages, SuperUser asked me to log-in again. I tried this several times with no success.

I tried the latest Chrome Browser and Microsoft Edge Browser. I waited 5 minutes in each, and neither would even open SuperUser at all.

I am posting this question from Pale Moon Browser on a different computer. The irony is the question I posted was about being unable to install Pale Moon Browser.

I could not find a FAQ or anything similar to tell which browsers you support. Which browsers are supposed to work with SuperUser on Windows 10?