Problem
Sometime you want to install an extensions not from chrome store, but dragging it into the
chrome://extensions
will get you this message:
Solution
Find your extension by id from this folder on macOS:
/Users/username/Library/Application Support/Google/Chrome/Default/Extensions
Windows:
C:\Users\username\AppData\Local\Google\Chrome\User Data\Default\Extensions
And then use
Load Unpacked
to locate the exentison and then enjoy!Note: you might need to enable
Developer mode
in chrome://extension
if not enabled already.