This is a wonderfull tool and it's has a high accurancy detection that's why I love it. In firefox it's located in a very nice location when you install the addon right next to the url bar I love this.
In fact I did intergrate it online here https://www.nmmapper.com/st/cms-detection/wappalyzer-online/
De add-on installs, I can change settings etc. But the icon doesn't show on top in the taskbar together with the other add-ons, so I can't use it. I use latest update v68.0 (64-bits). For now only 1 star!