User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0 Build ID: 20150108202552 Steps to reproduce: I've search the Internet for Firefox Features request place, but did not find any. So sorry in advance if it is a wrong place. But I'm gonna ask you for a feature developers need 1000%. Actual results: I think now when the team of my favorite browser is turning face to developers, its time to do the greatest think all the developers will need much! Expected results: Have you ever seen Java's Netbeans profiling tool? It's a pleasure to work with it when you hunting a memory leak or something. You are turning on the memory profiler for a while, it collects information from memory about objects their quantity, lifetime, size (recursively summarized if developer selects only certain package) and generations. And the most greatest thing, it shows them in code-view and has a plenty of greatest filters to display objects by name, package name etc.

Oh sorry! Actually I've found it here https://ffdevtools.uservoice.com/forums/246087-firefox-developer-tools-ideas/suggestions/5713639-memory-monitoring. So you can delete this one if you want, or just use as start point for new feature implementation.