I'm noticing of late that since an upgrade of Firefox, it's memory usage has ballooned. My PC was going slowly so I checked the task manager just now and sure enough, there was Firefox using 687MB of RAM doing nothing more than just browsing LPSG (and not even the galleries). It really doesn't matter what sites I'm visiting, eventually Firefox just turns into a memory hog.

Any ideas or anyone else experiencing this? Firefox didn't used to do this.