I downloaded the file for tfasc which anonymous wrote on here then went to my extensions in firefox addons, on the settings it asks if you want to install addon from file and it installed immediately now I can see the menus better, mind you I did not upgrade to firefox 57 I kept 56, and I will not upgrade to 57, at least I have theme, font and size changer back on my laptop and I have version 56 of tfasc