Check the box to turn on the feature, and then click on the button to install the extension for either Chrome or Edge.
Open the iCloud for Windows app, and look for the Passwords option at the bottom of the window. The most recent version of iCloud for Windows has more features to help you keep your online accounts secure across Windows and Apple devices. While you're there, you may as well install any pending app updates. If you already have the iCloud for Windows app installed on your PC, open the Microsoft Store app, click the menu button with three dots next to your profile icon in the top-right corner of the app, select Downloads and updates > Get Updates and check for any pending app updates to make sure you're using the latest version of the iCloud for Windows app. What you'll need to use the new iCloud password feature