chrome-ext-downloader
Allows you to download the extension's source code without installing it.
Installation
$ npm install -g chrome-ext-downloader
Usage
Usage: ced <extension-id>
Example
Say you want to download the source code of Google Mail
Checker.
Grab the ID of the extension from the URL, in this case it's mihcahmgecmbnbcchbopgniflfhgnkff
. Then simply run the following and you will have the source code in the current directory.
$ ced mihcahmgecmbnbcchbopgniflfhgnkff
License
MIT