The "no display" issue in Firefox was due to having 'All Detected Trackers' set to Always. It's strange because I had done this a couple of days ago and the Twitter feed appearing at the bottom of my web page continued to show OK. I reset the trackers to 'Only in Private Windows'. Then it began showing again, like Edge and Chrome, albeit with the old data.
At any rate they did fix it, and it is still showing as up to date this morning.
Maybe this thread should be moved out of meteobridge/hub since it wasn't a related issue.
Greg H.