I installed this browser and am just impressed with the performance I am getting on my PowerBook G4 with it. You will need to compile it from source and download the needed dependancies first but I would some feed back on it. My only issue is that geck-media plugin I use on firefox does not seem to be compatible Qupzilla. I am also having the same issue with midori as well and post a thread in the multimedia forum here with no response. Anyways below are the dependencies for anyone who would like to try.
openssl libssl-dev libqt4-webkit libqt4-dev libqt4-sql-sqlite g++ pkg-config hunspell
Here is where you can get the source http://www.qupzilla.com/download#source
openssl libssl-dev libqt4-webkit libqt4-dev libqt4-sql-sqlite g++ pkg-config hunspell
Here is where you can get the source http://www.qupzilla.com/download#source