1. Pack the Extension After Installing
If you’ve already installed the extension that you want to download, you can just repack the extension into a CRX file. Before you do anything you need to know the Extension ID of the extension you want to download. Since you’ve already installed the extension, you can get the extension ID directly from the Chrome extensions settings page.
To start, click on the menu icon, and select the “Extensions” option from the “More tools” options.
The above action will open the Extensions page. Select the “Developer mode” checkbox, scroll down, find the extension you want to repack and
note the extension ID.
Once you have the extension ID, press “Win + E,” and navigate to the following location in the File Explorer:
C:\Users\<Username>\AppData\Local\Google\Chrome\User Data\Default\Extensions
Don’t forget to replace “<Username>” with your actual username. Find the folder with the extension ID, and copy it to your
desktop.
Note: if you are using other operating systems like
macOS (usually inside ~/Library/Application Support/ folder) or Linux (usually inside ~/.config/ folder), you need to find the relevant application folder.
Back on the extensions page, click on the “Pack extension” button.
This action will open a pop-up. Simply click on the “Browse” button.
In the Browse window, find the folder you copied earlier, expand it, select the folder with the version number and click on the “OK” button.
Click on the “Pack Extension” button. You can just ignore the Private Key field.
With the above instructions, you’ve successfully created the CRX file. In fact, if you open the extension folder on your
desktop, you will see your CRX file.