Works as expected. When I have two Firefox windows open (on two monitors), I can close the windows in any order and, next time I open Firefox, my pinned tabs are back. Mozilla should add this to Firefox, but for now the extension works fine. Thanks.

Easy to use and works! Should be how pinned tabs work in Firefox. I pin a tab and it stays pinned, even on start up and in new windows!

Simple and effective - exactly what I was looking for!