Can't actually answer your question :) but with reference to the last bit, >why does Mozilla have such a huge foot print? >It takes up around 100 Mbytes while Netscape is >down around 15 Mbytes. It doesn't actually. That's the same smaller chunk of memory but added up n times, where n is the number of concurrent threads running (probably about 6 for mozilla). unfortunately top doesn't seem to know about this. tim