Open the Chrome Web Store and navigate to the app or extension you want to download as CRX file. Make sure the ‘Overview’ tab is selected in the extension’s details’ page and copy the URL. Jan 02, 2019 After you download the crx file for Library Extension 2019.0102.2, open Chrome's extensions page (chrome://extensions/ or find by Chrome menu icon > More tools > Extensions), and then drag-and-drop the *.crx file to the extensions page to install it.