Screaming Penguin - Source Does Matter

The best browser around hits 1.4 milestone. This is the first "production" release since 1.0. Also note that this is the last release where all the components are together as one big app.

From here on the roadmap all the components will be developed and released separately. This is to enable Mozilla development to be more agile through multiple self controlled/contained smaller development efforts that dont have to coordinate/merge as much. This sounds like a good concept, but could get sticky if certain components are waiting on others and interfaces arent perfect, etc. Time will tell.

For now get the new stuff and as always help with whatever you can.
  http://www.mozilla.org/releases/#1.4