I just had to restart everything because my new Firefox 4 was using over 2GB! I have 8GB all together and couldn't run anything. It's also doing lots of hanging and "stuttering" - little delays when scrolling, entering web based forms etc. Very frustrating! Might roll back.

 3. Memory Usage Performance Guidelines  

'''Semi-Technical :''' I am not on OS X (''as of now''), but perhaps this will give some helpful pointers: <br/> # The leaks tool (man page) <br/>[http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/leaks.1.html This manual page is part of Xcode Tools version 4.0] #* Require Install of the Xcode Tools (say on page with link) # [[https://developer.mozilla.org/en/Using_Mac_OS_X_leaks_tool|Using the Mac OS X leaks tool]] And: 3. [http://developer.apple.com/library/mac/#documentation/Performance/Conceptual/ManagingMemory/ManagingMemory.html#//apple_ref/doc/uid/10000160-SW1 Memory Usage Performance Guidelines] * From: «Mac OS X Developer Library» * Have ie: ** [http://developer.apple.com/library/mac/#documentation/Performance/Conceptual/ManagingMemory/Articles/FindingPatterns.html#//apple_ref/doc/uid/20001882-CJBJFIDD Tracking Memory Usage] ** [http://developer.apple.com/library/mac/#documentation/Performance/Conceptual/ManagingMemory/Articles/FindingLeaks.html#//apple_ref/doc/uid/20001883-CJBJFIDD Finding Memory Leaks] (''Hopefully someone can test, check and reply a how-to or other information from this.'')