Mine is not working. I tried 3 versions. All i am getting is a blue green page with a small 1 inch line at the top left corner of the page. I do have massive bookmarks so i waited 5 minutes to see if it would load but it did not. I also reloaded and waited 3 times but nothing loads I'm using FF 56. It is possible there is a conflict with my current addons. I do not have any other bookmark addons installed just my regular built in that comes with FF. I will give 5 stars if you answer me and help me fix the problem. Thank you in advance for helping me.