I posted a while back on the Flock browser and how it had several nice features in that allowed one to pull the parts of one's online life together in your browser. I stand by my comments that it is a nice browser for those who plug into the social networks and applications of the the web but I have still decided to reset my default browser to Firefox.
There are many rational reasons for defaulting your web browser to Firefox. The main reason that I chose to go back home is that it is simply easier to tag things in del.icio.us using Firefox's plugin than it is to use Flock's del.icio.us integrated favorite button.
Often we talk of the next cool thing that we integrate into our technology lives but often ignore talking about our experiments that don't work out. What are your "failed" experiments?