Description
Intermittently over the past year, I've had issues accessing the coffea-casa server while using Firefox. Zora mentioned similar problems this morning, so I learned I'm not alone! I imagine this is a caching issue on the part of Firefox that we can't fix, but having a reference for it here doesn't hurt.
As a further data point, I've had similar problems connecting to Jupyter Notebook instances that I've ran on the UNL t3, so coffea-casa isn't alone. On the other hand, coffea-casa has its own webpage, while running a notebook involves ssh-tunneling, so maybe these problems aren't comparable and coffea-casa should have more sophisticated behavior (I really don't know enough about networking/browser caching to answer this).
In any case, opening coffea-casa in another browser (Chromium-based ones seem to be the most friendly, anecdotally) fixes the problem.