I much prefer this solution. As someone who can have over 100 tabs open with potentially a dozen YouTube tabs amongst them, having to hunt down all the YouTube

I much prefer this solution. As someone who can have over 100 tabs open with potentially a dozen YouTube tabs amongst them, having to hunt down all the YouTube tabs after a browser restart is a serious pain! Also frequently FireFox crashes for me are due to it hitting the 4GB memory limit (well closer to 2GB obviously), so restoring all tabs would just result in Firefox crashing again. Restoring them piece meal lets me close down ones I do not need, thus allowing me to get FF's memory usage down to acceptable size.