Is anyone else seeing this? Since the last Firefox upgrade (or maybe even the one before, but I just caught this) I'm seeing three instances of Firefox running in task manager/processes. They each have different memory usage. I only picked it up because I heard my drive and fan running while I wasn't doing anything and wanted to see what the heck would be using the CPU. The CPU usage for the three instances is only 0-3% though. Only one Firefox window is running.
Anyway, weird, and I'm wondering if it has to do with recent changes in Firefox. I've noticed it has also started doing weird stuff with add-ons, Flash being one example. While I'm not a Flash fan, unfortunately it's used by several sites I use regularly.