Mozilla is working hard to manage memory/RAM in the most efficient manner. In many 3rd party tests, Chrome uses more RAM than Firefox for the same set of tabs. Mozilla is tracking this here: https://areweslimyet.com/faq.htm
Chrome does have heap snapshots https://developers.google.com/chrome-developer-tools/docs/he.... Also chrome has some tools to analyze thos snapshots they are still far from what the Eclipse Memory Analyzer http://eclipse.org/mat/ can do for Java apps. Fortunately chrome heap snapshot support will be coming soon for the Eclipse Memory Analyzer.
IE BTW now has similiar heap analysis tools.