Hi kalabaka, I do not see any previous question. Maybe you asked somewhere else or using a different name. I am not to sure what the problem is that you see. If you set Firefox to show tabs and windows from last time that is what it will do and presumably is doing for you. You say all tabs load but if you have a lot of tabs Firefox should initially by default only load the visible tabs. If for instance you have two windows each with 5 tabs that will be all your tabs that load when Firefox starts. If you have a couple hundred tabs spread over three windows only one of which is maximised then only a small number of those tabs will load when you start Firefox. You can even force Firefox to start by working offline (That's from the days when the internet was slow and expensive) it will then only be able to load some of the tabs that are in the cache, and will not load them properly and update them until you work online.