Hi, I deployed Firefox 50.0 through GPO. When one of my users tries to post an item with their custom CMS, the Firefox rich text editor isn't activating (see screenshots). First I thought it was maybe related to Firefox itself but when I checked my own pc, which has Firefox 50.0 installed manually since it's my main browser, it DOES show the rich text editor. Can anyone tell me how to enable the rich text editor without resorting to addons? I searched through the Firefox options and about:config but couldn't find any related setting. Thanks in advance. screenshot where the rich text editor doesn't show (user pc): http://imgur.com/a/wiuEd screenshot where the rich text editor does show (my pc): http://imgur.com/a/j7z9v