THanks. I will watch the largest free block with this tool and report what it says. How much memory does it need for an empty tab? It is really a shame that for a simple empty page it can eat up megabytes of RAM just for showing nothing. This Cairo stuff is not good in my opinion. It seems to be so wasteful with resources. So all in all it means: there is no way out until we have a MOS with virtual memory and all that stuff.