This is one area where I've long admired Firefox... and it's benefitted them for mainstream market-share penetration.
When they release something to even beta, it looks very interesting and exciting.
Agreed. The "Minefield" (besides being a terrible alpha/pre-release codename) icon left a lot to be desired.
Mozilla nightly builds have always (AFAIK) been called Minefield. The name discourages non-developers from installing it (unless they mistake Minefield for a new version of Minesweep). :)