Wappalyzer is available on both firefox and chrome this cross-platform utility that uncovers the technologies used on websites.
Wappalyzer is a cross-platform utility that uncovers the technologies used on websites.
Installing wappalyzer on ubuntu and debian.
The builtify thing about wappalyzer is it's opensource, the source code is available under the GPL v3 licence, you can even run it from the commandline this is very helpful. If you want to run in through the commandline here is how to install it.
sudo apt install nodejs
npm i -g wappalyzer # Globally(recommended for commandline)