While I was using debian etch , I used to get the feeling .. why iceweasel ? why not firefox? I used to ask praveen , but I never understood clearly .
Mozilla Firefox is not a complete free software !
It's log and name are trademarked.
And the patches which debian wants to include in firefox tree are supposed to be approved by mozilla ! ( which ofcourse mean't upstream work )
What about the versions which are no longer supported my mozilla ?
Hence there rose a browser called iceweasel which I had to use and report bugs !