I try deb package version because it solved me all unsatisfied dependencies that made iceweasel(firefox) crash.
First we download .deb package.
$wget http://fpdownload.macromedia.com/get/flashplayer/current/install_flash_player_10_linux.deb
Now we install the package.
#dpkg -i install_flash_player_10_linux.deb
Solving dependencies problems
#apt-get -f install
You can now run iceweasel with adobe flash plugin support.
NOTE:Another way of installing this plugin is the Debian installation way:
supposing you have non-free repositories added in your sources.list file.
#aptitude install flashplugin-nonfree
It automatically installs tar.gz version from adobe page
However dependencies are not the same as .deb package and my iceweasel crashed.
REFERENCE URLs
http://get.adobe.com/es/flashplayer/
http://www.adobe.com/es/products/flashplayer/productinfo/instructions/