Guess this extension is dead - no response from the dev for a year now... Rated 1 out of 5 stars

Too bad... seems like such a simple thing, since the button only has to execute the same code as the menu command, but apparently not or else you'd think someone else would have come along and figured out how to update it. I took a peek, but quickly got lost (ianap)...

This user has a previous review of this add-on.