Manual installation of firefox in boss

1. Download firefox3 extract it at Desktop/ directory
Download link:- http://mozilla2.snt.utwente.nl//firefox/releases/3.5.7/linux-i686/en-US/firefox-3.5.7.tar.bz2

2.download install_flash_player_10_linux.tar.gz
Download link:- http://fpdownload.macromedia.com/get/flashplayer/current/install_flash_player_10_linux.tar.gz
Extract the  downloaded file it will generate     libflashplayer.so  file

put this .so  file into firefox/plugins  directory (firefox is previously extracted firefox)
Copy firerfox folder into  /opt/ directory

3.create link as
 sudo ln -s /opt/firefox/firefox /usr/bin/firefox

4. Go to system->prefrences>main menu
then go to application>internet
  double click on iceweasel web browser

you will get a window named launcher properties

edit the Command ,replace iceweasel %u with /usr/bin/firefox

Then restart firefox.