Add on works but causes Firefox tabs to crash very often (about every 10 min). The tab you are in becomes completely unresponsive and your only option is to close it. Which is extremely annoying when you are in the middle of writing a comment on a website and you have to start over again.
After I disabled this add on, the lock ups instantly stopped happening.
I'm sure this works great for what it was designed for. However, I build my own Home Page using images on my harddrive as my link, not text. Because New Tab Override cannot load local images it's pointless.