Browsing around just by using the Tab and Enter keys was always possible in Epicyon [1], but the tab sequence didn't make much sense and it was more a case of *"hit tab and hope for the best"*. Also on some screens tab position highlighting was missing.
Now tabbed browsing has been improved so that the sequence is more logical and this style of navigation should be more practical. Missing access keys [2] have also been connected to the user interface so that for example you can immediately create a new post using a particular key combination (shift+alt+n).
The access keys are all customisable, and if you can remember them and are using a laptop or desktop then operating Epicyon can be significantly faster than dragging a mouse around. This system is also sufficiently lightweight that provided that your internet bandwidth is good then moving between screens is comparably fast to using a native app.