Add "Tab Close Button"and "Automatic Find As You Type" extensions in Epi by default

["thibaut bethune" <thibaut bethune gmail com>]

Hello,

I find that hiding the tab close buttons on non-focused tabs could
improve the user experience, avoiding him to close a wrong tab (and
also puting the focused tab again more in foreground).
Actually, that can be reach through an extension but maybe it would be
the default behaviour of Epi ?

Besides, the "Automatic Find As You Type" could be available through
Epi option menu, without having to install that extension ?

Thank you for Epiphany