Last Epiphany release with a gecko back-end..

.. Is Epiphany 2.26.3. Yay for webkit :)

Reference

http://blogs.gnome.org/epiphany/2009/07/01/gecko-end-of-life/

Epiphany 2.20.2 has been released

And I was pleased to read:

A lot of refactoring work is taking place to bring the Gecko and Webkit back-ends on equal footing.

References

Announcement
Bug fixes and release notes
Downloads
epiphany-a-light-web-browser-en
unofficial-epiphany-extensions-en
more-epiphany-extensions

More Epiphany Extensions

Unofficial Extensions were already available for Epiphany. Third Party Extensions are now available. One that was not present in the Unofficial Extensions page and that I’m going to test: Confirm Window Close.
Enjoy!

Reference

Epiphany Blog