I tried to set up a SSH tunnel and use SOCKS5 proxy. However, I could only find HTTP/HTTPS/FTP/RTSP/Automatic proxy set up in Internet Connection setup (Advanced). What is worse, I could not find a place to set up SOCKS proxy for even just for the web browser (default/firefox).

Could I use third party software such as tsocks(http://tsocks.sourceforge.net/index.php) or Dante(http://www.inet.no/dante/) to "socksify" everything?

By the way, how could detect which shell command is used to start any one of the softwares installed?

I appreciate your help.