Identify web technologies
Wappalyzer is a cross-platform utility that uncovers the technologies used on websites. It detects content management systems, ecommerce platforms, web frameworks, server software, analytics tools and many more.
List of applications Wappalyzer detects:
https://wappalyzer.com/applications
Firefox version:
https://addons.mozilla.org/en-US/firefox/addon/wappalyzer/
Bug reports and suggestions:
https://github.com/AliasIO/Wappalyzer/issues