Rated 5 out of 5 stars
It would be better if middle button replaced by a key from keyboard. I use a MS mouse and i have assigned middle button to magnify. I should restore to original settings MMB to work for Stay-Open Menu.This review is for a previous version of the add-on (1.4).
Re: middle button replacement
You can use Stay-Open Menu 1.4 with Ctrl-click instead of using the mouse. See details at homepage to enable: http://www.shadetreeapiary.com/extension/#config