How to restore previous session


I installed updates for Firefox,Windows and Adobe because the stupid notifications kept coming up. I use Firefox mainly but due to Adobe it stopped loading flash so I switched to Comodo Dragon

I restored the Comodo but also did so to Firefox-I bought back the Comodo tabs but Firefox forgot the old tabs so I did a restore

The problem is now Firefox tabs are back but Comodo’s aren’t. If I open new tab to look for previous session it doesn’t have it-even with system restore it doesn’t recover them EVEN THOUGH the initial time I recovered them today (but the problem then was Firefox’s weren’t)

How do I recover BOTH browser tabs?