I usually have a lot of unread tabs on one day, and have to leave them for the next day to read. The next day, I open a lot more tabs and have to leave them for another next day. This cycles everyday of the week. However, on Sunday I want to open a fresh new Firefox window to give me a break. On the next Monday I want to resume the old window from the last Saturday which having a lot of unread tabs. The next Sunday I want to resume only the window that I have left from the last Sunday.
Is there an add-on that helps me achieve this? I can use another browser like Chrome, but I miss the add-ons that only Firefox has.