Rated 5 out of 5 stars
Easy to use, unobtrusive, does one thing and does it well.
No harm in giving it a try; installation happens on-the-fly (no Firefox restart required).
If you're like me and don't know vi, but have wrist problems from using the mouse from 9 to 5:
Just hitting "f" to open a link helps a lot.
@Developers: How can we donate to you guys?