Chrome extensions

How to add third-party extensions to Chrome, like from www.chromeextensions.org.

$ open ~/Library/Preferences/com.google.Chrome.plist
Add a Key at the root level called "ExtensionInstallSources", as an Array type.
Expand its triangle and click the + button.
Add "http://www.chromeextensions.org/*" to the list
Then simply restart Chrome!