I can not find them under ~/Library/Application Support/Google/Chrome/; Where are they?
The default locations of Chrome's profile directory are defined at http://www.chromium.org/user-experience/user-data-directory. For Chrome on Mac, it's
~/Library/Application\ Support/Google/Chrome/Default
The actual location can be different, by setting the --user-data-dir=path/to/directory
flag.
If only one user is registered in Chrome, look in the Default/Extensions
subdirectory. Otherwise, look in the <profile user name>/Extensions
directory.
If that didn't help, you can always do a custom search.
Go to chrome://extensions/
, and find out the ID of an extension (32 lowercase letters) (if not done already, activate "Developer mode" first).
Open the terminal, cd to the directory which is most likely a parent of your Chrome profile (if unsure, try ~
then /
).
Run find . -type d -iname "<EXTENSION ID HERE>"
, for example:
find . -type d -iname jifpbeccnghkjeaalbbjmodiffmgedin
Result: