How to Install Chrome Extensions in Developer Mode
Download and unpack the .crx
file (which is a regular ZIP archive) to any folder you want. i.e. C:\chrome\my_extension.
Open Chrome and navigate to the extensions manager. The extensions manager can be reached
through Chrome's menu system or by entering chrome://extensions in the URL bar.
chrome://extensions
Check the box labeled "Developer Mode" at the top of the extensions manager page (if it is not
already checked):
Click the Load unpacked extension button and point the browser to the unpacked extension folder:
Choose your new extension folder i.e. C:\chrome\my_extension.