Rated 4 out of 5 stars

This is a really great add-on.
The only problems I have with it it that for some reason Firefox's default shortcuts (ctrl+1-9) aren't replaced in version RC1. In the Linux version, it works fine, since it uses alt+1-9 for tab selecting.
Also, in the Linux version, the address bar isn't selected right after you make a new tab, so you have to select or delete all the text in the address bar to go somewhere else.

Still, great add-on and very useful!

This review is for a previous version of the add-on (0.7.0.8). 

This is solved in the new release, which is awaiting review by the AMO editors. Firefox 3 was still in development, so the new changes broke some features.