Firefox+flash don't load page correctly in F8 - same versions in F7 do

[Marcelo Magno T. Sales]

I got a link that opens the application without the need to log in to 
the bank web site:
https://www.hsbcinvestimentos.com.br/ITE/app/portalinvest/painel.shtml

The application do not finish loading when I open it on F8, but will 
load and work correctly if I open it on F7, using the same versions of 
Firefox (2.0.0.10), flash-plugin (9.0 r115) and Java (1.6.0_02-b05).
If you have any hint on what may be causing this, I would like to hear 
about it.

Thanks,

Marcelo