I wish there was a spatial navigation add-on tool to joint this Rated 5 out of 5 stars
Pros: works with virtually any website
cons: didn't find one
There is a spatial navigation extension called "crossfire" for Chrome and I tried a couple of keyboard next page extensions for chrome in hope of finding a totally mouse-less solution for browsing.
None of the next page extensions in Chrome worked as good as yours. Now I can see what a remarkable job you've done.