So it seems like Firefox is having problems and everyone has been complaining about it a lot. I sure hope they fix it quickly. It's crashing on me constantly when I indulge in my YouTube addiction, and it uses up an ever-increasing amount of memory. A lot of my friends are enjoying Opera, but I just can't bring myself to install a proprietary browser.
I decided to give KDE and Konqueror another shot. I'm actually pretty pleased with it. Although Konqueror doesn't support two of my favorite Web sites, GMail and YouTube, it is very stable and very snappy. Even better, it uses half as much memory. It has a menu option to open the current page in Firefox, which is helpful for the times it doesn't work. This matches what a lot of Mac users do: they use a mix of Firefox and Safari.
On the other hand, something strange happened when I was installing KDE. I accidentally uninstalled the Ubuntu flashplugin-nonfree package. Today, when I went to YouTube, Firefox asked me to install the Flash plugin locally (i.e. not system-wide). Since all I had to do was hit OK, I did. Voila, Firefox stopped crashing all the time. Weird.