Install Firefox, Opera, Konqueror, IE on Ubuntu

I has been developing a platform independent web application which should be work well in many different web browsers such as Firefox, Opera, Konqueror, and Internet Explorer. So I need to install all for testing my application. Now, what I have been done to install these browsers.

Firefox
Firefox is available in Ubuntu 7.04.

Konqueror

sudo apt-get install konqueror

Opera

cd ~/Desktop
wget http://opera.eurenet.net/linux/920/final/en/i386/shared/
opera_9.20-20070409.6-shared-qt_en_i386.deb
sudo aptitude install libqt3-mt
sudo dpkg -i opera_9.20-20070409.6-shared-qt_en_i386.deb
rm opera_9.20-20070409.6-shared-qt_en_i386.deb

Internet Explorer

Step 1: Install wine and cabextract
sudo apt-get install wine cabextract

Step 2: Download IEs for Linux and install
wget http://www.tatanka.com.br/ies4linux/downloads/
ies4linux-latest.tar.gz
tar xvf ies4linux-latest.tar.gz
cd ies4linux-2.0.5/
./ies4linux

Step 3: Run IE and enjoy
./path_to_your_home/bin/ie6