It's hard to connect to plurk.com under ubuntu. So I tried to install Opera and set up the proper proxy for hinet network. And the result is: wonderful!
So, I started to browse some websites by using Opera. In this way, I don't have to keep going back and forth between firefox and Opera. However, I am too addicted to vimperator under firefox that sometimes I accidentally press the wrong commands in Opera.
After searching some materials on the internet, I found that the keyboard shortcut management on Opera is flexible enough to do most of the tricks in Vimperator!! And all I have to do is to install a ini file that is already customized by other opera users. What a great news for me. :)
Here's the link, have fun!!