I agree with the statement that Simplicity and speed should always be priority #1. I have switched browsers frequently through the years and always for the same reason. A browser that was faster and whose main goal was to display HTML pages.
I moved to Phoenix because its start time was low and it was simple. At one point I even used the Java Web Browser for the same reason.
However, Firefox has become slower over time. This prompted my switch to chrome. I am sure that I will switch again when chrome becomes too slow (Uzbl or Surf look good)
It would be nice to see Firefox return to its roots.