Really good and helpful. I used a previous / different plug-in which does not work / is not maintenad for the newer Firefox and this one come just in handy! Only problems I sometimes have is with Web-addresses which uses a "TOC2 Window" design, when auto-reloading the left panel disappear, but this can be worked arround with a "Back" action on the Browser. Still way better and simple than loggin in again.