Hello sir jscher2000 and thank you for your help. interval set was on 15000, so it can't be issue for Firefox...Today, I moved left-right number of tabs to test Firefox. I closed some tabs to see if reducing the extra tabs would fix this problem, Fir...
I also have this problem about restore last tabs today. For example, when I write this comment now, I close the Firefox window on this tab. When I open Firefox again, I expect it to open on the last browsed tab according to the settings. But it opens...
