Hmm, my tabs screen looks the same as other recent versions. Could you double check both the non-private and private tabs (the two icons at the upper left of the tabs screen) in case your missing tabs are in the other category?

No tabs in InPrivate area. I can send screenshots of my problem. I currently have 3 open tabs according to the "pages" icon in upper right corner but when I click on it the only thumbnail I see is for this page. Also quite frustrating because there is no "X" next to the thumbnails to close open tabs (because there are no thumbnails). When I click on the pages icon I can scroll up or down next to the displayed thumbnail and that closes the corresponding tab with a pop-up message alerting me that I closed the tab and giving me the option to undo. I believe I am not the only user with this issue based on a recent post I just read. Was there a recent update to Firefox? I might have no choice but to uninstall. Would hate to because I have liked Firefox........until now.

I restarted my phone and it is working fine now. Issue resolved.