Pale Moon forum

This happened once before: viewtopic.php?t=19568
Same thing again exactly. It only happens on the one site. That site works fine in firefox. I switched to a backup profile and it works fine. But, just as before, it wasn't a deliberate profile change. No new extensions were added. No setting was changed in between the time it worked and the next morning when it didn't.
I still have the old profile if anyone wants to suggest what to compare to figure why this happens. Not a high priority for me personally since my backup profile works fine, but might be nice to know why this happens.

URL?

Did you try clearing cookies?

Thanks. Deleting cookies did it. I'd be real interested if you cared to explain why. Is the check mark now the button to label an answer as the solution?

Could be that the site locally saves volume settings in a cookie, and maybe muting it one time got it to get stuck.

If it "suddenly stops working" and clearing cookies fixes it, then it is in 99% of the cases a matter of the website having changed something, there still being a cookie in the browser from the "old situation" that wasn't expired, and the website as a result doing something unexpected. The exact reason and details will vary per site implementation.
This is why clearing your cache and cookies is always a good idea before you report something as a potential bug or issue.

I see. Thank you both.