Just one "quibble"... Rated 5 out of 5 stars
Except for forcing about:newtab onto the "Home" page, I like it. Most of all I like the Settings treatment. (Yes, I know you can hide the grid. I don't want to hide the grid. I just don't want NewTab there.)
How about adding Fx resident memory usage to your About Firefox frame? :D
The content of the newtab page can be hidden.
Just click on the iconic button on the top right of the newtab page zone.