Salamander server shut down and Restart

I am doing lessons 1 and 2 from part 1. I open several notebooks on several tabs in my browser. When I am done for the day. I would like to leave all my tabs open and start up where I left off when I get back, but when I shut down the server it seems that I have to close all my tabs and reopen them, as well as running some of the cells(ex: from fastai import *) in each note book again. I am using salamander.
Thanks for the help!