Frozen like an ice cube Rated 1 out of 5 stars

I added this tool to the add-on collection today. After the restart of FF, I opened the add-on window and every time I either clicked on the "options" button for this tool or tried a right-click to look for options of this tool, the add-on box would freeze. I couldn't move, select other things, or even close the add-on box and had to force FF(rel 3.6.3) to close. Once the tool was removed, FF was back to working normal. NOT good. Can NOT recommend based on this performance. *two thumbs down*