Server Spy

See http headers returned by the server you're visiting.

if you modify it by yourself, you need to zip it:

zip -r /ramdisk/ServerSpy.zip * -x *.git*

INSTALL

bads.tm store https://extensions.bads.store
Firefox mozilla webstore | GitHub Release
Chrome https://chrome.google.com/webstore/detail/server-spy/mcgbfbichapcffmamnmgcobomdpgeagf