Worked great for a few days, then disappeared from the extensions bar in Firefox. Tried reinstalling, disabling, safe mode, and nothing gets it to appear back on there. Haven't had any issues with the Chrome version though.
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!