Help! In Firefox 89 (as in all previous) all open tabs lined up at the top (first screen shot). When I updated to 90, they disappeared and only one (current) tab shows up at bottom right (second screen shot). I cannot find a way to see all open tabs as before - only when I close the current tab will the entire lineup of open tabs show for a moment and then go back to the single current open tab. I can't work this way and it's driving me crazy. I've searched online, tried changing settings in about:config and nothing seems to want to put all open tabs back up top where they were. What am I missing? (More - I am trying to upload a screen shot and just get the spinning gear. The file is below the upload size limit. I'm going to try submitting this anyway.)