Powered by the Gecko engine, Epiphany displays webpages with the same speed and accuracy as Mozilla Firefox. In addition, it provides an elegant, responsive and uncomplicated user interface that fits in perfectly with GNOME, and it has been translated to over thirty languages!
Adds extra features to GNOME's Epiphany web browser, including action, adblocking, auto-reload, auto-scroller, console, extensions manager, find, greasemonkey, javaconsole, mouse gestures, move tabs between windows, python-console, pushscroller, rss extension, error viewer and validator, certificate viewer, sidebar, smart bookmarks, page info, CSS Stylesheet, favicon.ico, tab states and a GNOME Dashboard interface.
Customizable user interface
Epiphany lets you arrange user interface elements by simply dragging and dropping with your mouse. It also provides tabs, so you can easily organize related webpages on your computer screen.
Smart bookmarks make it a snap to lookup text in online knowledge bases, like dictionaries or search engines. Also, you don't have to keep track of in which subfolder you put that one bookmark --- just assign it some topic(s) and Epiphany will show you the relevant bookmarks in a dropdown menu.
Extensions and plugins
Need some specialized browser function that's not available in the default menus? There's a good chance someone has already written an extension for you. The Epiphany Extensions package is what you will need. Epiphany runs all the same popular plugins that run in Mozilla.
Install Epiphany web browser in Ubuntu
sudo apt-get install epiphany-browser epiphany-extensions
This will complete the installation
Using Epiphany web browser
If you want to open Epiphany web browser go to Applications--->Internet--->Epiphany web browser
Epiphany web browser in Action
Epiphany web browser Version Details
If you want to enable Epiphany web browser Extensions go to Tools--->Extensions
Once it opens you should see the following screen where you can enable Extensions