This one needs the extension
The scanner asks every address on your subnet for its device info and reads back the model, serial and firmware. A web page is not allowed to do that: mixed content, CORS and Private Network Access each block it, and none can be worked around from a website.
The extension is exempt because you grant it local-network permission at install time. It is available for Chrome and Firefox on the desktop.
Everything else works here
Chipset lookup, MSRP pricing and the field-of-view tool are all on this site — no install, and they work on a phone.