I have install the add-on, but I did not get any feedback indicating that it was doing install door was installed. I do however, See one tab as a item on the drop-down box on browser page - these are the three dots in the upper right hand corner of the page. When I click on that I see one tab at the bottom, but when I click on it nothing happens. Every tutorial shows an actual one tab page and a funnel an an icon and I'm not seeing any of that stuff. Most tutorials have seen on for desktop computers and I'm using an Android tablet. Thank you Please note I'm using Firefox version 59.+ and One Tab version 1.25