what is the reason for not making epiphany the default browser?

[Sander van Loon]

I asked this to Matt Zimmerman, he replied to me that I should post this
on this list so that other people know the reason as well.

Part of original e-mail to Matt Zimmerman:

Please read this https://bugzilla.ubuntu.com/show_bug.cgi?id=18786 .
Here you closed this feature request with the explanation that it should
be discussed on the ubuntu-devel, and that it has been discussed before.

So I started searching in the archives of ubuntu-devel of the past 6
months. The only post which discussed this issue was this one:
http://lists.ubuntu.com/archives/ubuntu-devel/2005-September/011292.html . Ironnically however another developer, Jeff Waugh, later replied that it should not be discussed on ubuntu-devel - http://lists.ubuntu.com/archives/ubuntu-devel/2005-September/011311.html .

But what I still don't know is why the Ubuntu devs don't intend or don't
want to replace Firefox with Epiphany by default. Could you please
explain the reasons to me?