I think that 3.6.15 has a bad memory leak problem.
In the last month or so, two different computers show increasing memory commitments using the Windows Task Manager. On a laptop with 2GB of memory and memory loads around 800MB, it hangs with Firefox consuming 99% of the CPU. The whole computer is hung up. It does not want to switch tasks. For instance, if I've used the computer for heavy web searching and document downloads, I was at over 500MB memory load. Closed Firefox with Task Manager, and reloaded. Only 150 MB required to bring Firefox back to the close condition.
In the last month or so, two different computers show increasing memory commitments using the Windows Task Manager. On a laptop with 2GB of memory and memory loads around 800MB, it hangs with Firefox consuming 99% of the CPU. The whole computer is hung up. It does not want to switch tasks. For instance, if I've used the computer for heavy web searching and document downloads, I was at over 500MB memory load. Closed Firefox with Task Manager, and reloaded. Only 150 MB required to bring Firefox back to the close condition.