Don't waste your time, this add on is useless. I use a custom HTML menu that is local. This won't let you use a local HTML file, only live web content. I'd also like to know why we need an add on for something FF should do in the first place. I'd give it zero stars if it would let me.

This works until i closed the browser. When I open the browser again it does not work. Don't waste your time

Doesn't work at all

totally useless ... it doesn't have any effect on anything!!!

Once this is enabled, tabs will only open momentarily then immediately close.