Some Firefox add-ons are pretty cool.
Morning coffee is an add-on that basically stores sites that are frequently visited as a list and slotted as per weekdays.This eliminates the daily chore of opening the same websites in multiple tabs again and again daily.
Download the add-on from here.Using it is very simple and effective too.Once installed,the coffee cup icon will show up in Firefox navigation panel.
To add websites that should open as per scheduled weekdays,click on the coffee cup icon and select Configure.
This brings up a window where all websites can be added as per preferred weekly schedule.
All done.