Flash Player uses LOTS of memory for buffering
When I open several tabs with YouTube, Flash Player starts to buffer the videos. I noticed that when buffering, firefox.exe and plugin-container.exe both allocate huge amounts of memory. This causes the RAM to fill up and the swap file to increase in size. It seems to me that whole videos are being put into memory. Possibly twice.
This is completely unnecessary as Flash Player copies the videos into the Temp folder regardless.
This problem causes some heavy swapping which can make the system completely unusable for up to twenty minutes in my case.