Yes, it does work. Just make sure you start from the correct page. Rated 5 out of 5 stars

After a few tries I managed to reproduce satisfying results with this add-on, but noticed Gmail is VERY particular about how you go about this—if you are already on when you install this add-on (or attempt to access Gmail through that URL after installation), you will NOT be redirected to You MUST begin at (or the aliased URL for this to work.

@developer: Love your add-ons!

Can't reproduce Rated 3 out of 5 stars

Followed your steps to a t and I get no redirect.

Oh! You are lucky!
It is 100% reproducible in my environment.