Originally Posted by confucius

@jimmy7

Do you know the directory path where the .crx files are stored to make sure all malicious extensions are gone?

@confucius, this is what I've found:

After you install an extension, all the files are in a folder named according to the extension ID. To get the extension ID, go to chrome://extensions/ and make sure Developer mode is checked.

Installed Chrome extension directories:

Mac
/Users/USERNAME/Library/Application Support/Google/Chrome/Default/Extensions

Windows 7
C:\Users\USERNAME\AppData\Local\Google\Chrome\User Data\Default\Extensions

Windows XP
C:\Documents and Settings\USERNAME\Local Settings\Application Data\Google\Chrome\User Data\Default

Linux
~/.config/google-chrome/Default/Extensions/

Note: Additional directories are created when you have multiple profiles in Chrome. To get to an extension installed for the second profile, replace /Default with /Profile 1.