Not reliable at all Rated 2 out of 5 stars
Not working half (maybe more) of the times. Scissors just go gray and nothing happens. Seen on several computers. Unusable addon for me.
Rated 3 out of 5 stars
Don't know why, but from (I think) FF 6 beta doesn't work. First button press: gets gray, doesn't copy to clipboard and stays blocked. :/ Before then, it was great addon.