SrWare Iron eats save file space

[nooby]

The to me most important problem with Srware Iron is that it eats up
my personal space in the savefile.
Suppose I have 195 MB left of personal storage and
then start looking at different Cat or Kitty Webcams from University
and such on Iron then it suddly is down to only 70MB left.

so I would need to know how to move from root/download
to mnt/home but I have no idea how to do that on Iron

Another browser question.
I could compare three different browsers on webcams .

Firefox 17 and Opera 12 and Iron/chrome 23

and only Iron7chrome worked on some Cat webcams
but that could be something I failed to set up properly.

all of them work here http://www.abbeyroad.com/Crossing

but for me only Iron Chrome here http://www.ustream.tv/ffrc
How do I set up Firefox 17 so that one also work there instead of crashing?