chromium/chrome/test/data/extensions/trivial_extension/README

A minimal extension that requests no additional permissions and has only a
trivial event page.

The extension must be packed to ./extension.crx using the private key
./extension.pem. For the instructions, refer to:
<https://developer.chrome.com/extensions/packaging#creating>.

The extension ID that corresponds to the ./extension.pem private key is
"mockepjebcnmhmhcahfddgfcdgkdifnc".