> It only asks for harmless permission, install it!
Not true. It lists all the permissions being requested. Sure the scrollbar issue is real and should be an easy fix.
I don't understand why people are so confused about permissions. If the user grants your extension permission to read your browsing history so it can provide value to them, why is that a problem? It's not. The problem is if the user grants a malicious extension the same permission because the extension is fraudulent. The author said this extension would never pass chrome store review, so it seems that the user would never be in this position in the first place and your example doesn't really match reality.