On restart many tabs are moved elsewhere in a window

When I restart Firefox on my PC, many tabs in at least one window will be moved from their position. Usually to the end of open tabs within that window. I've been dealing with this for years and never heard a response from anyone else. It is very annoying as many of my tabs are set up in a sequence. I have to find the first one, manually select them all, and then use the command to move them to the start of the window.

I am trying again to see who else has experienced this problem and if there are solutions for it.