The purpose of this thread is to have an area devoted to helping epiphany users find some useful extensions. I will start this thread with an extension to have only one close button instead of a close button on each tab. For those who don't know, the extensions will be like the ones I posted here. It consists of two python scripts.
Once you have the two files, You move them to ~/.gnome2/epiphany/extensions/ and they will be available in your epiphany extensions config area (requires the epiphany-extension package)