
Now called Wappalyzer, I think this is one of my most used chrome extensions. I am still a big fan of BuiltWith for extensive analyzing of a site's technologies, but from a UX and quick scan, Wappalyzer is by far the best.
Brilliant and simple tool to check what tech stack your prospects leverage. Makes segmenting and filtering of prospects better and dialogue more relevant.
Since Firefox Quantum launched, I thought it would be great for new (Chrome) users to educate them of Firefox Multi-Account Containers.