FF 16 (aurora), Ubuntu 12.04, core i7, 4GB ram (no swap). Memory usage jumped to about 2GB before the machine became totally unresponsive. I did something els

FF 16 (aurora), Ubuntu 12.04, core i7, 4GB ram (no swap). Memory usage jumped to about 2GB before the machine became totally unresponsive. I did something else for a few minutes while I waited for the kernel to kill anything using too much memory and get my machine back to a usable state.