Passle will detect the browser you are currently on and load the relevant instructions to help you get the Passle button on your browser either in your bookmarks bar or as an extension.
If you are struggling to find this page you can also log in to your Passle account and navigate to the bottom of the left-hand navigation bar and select the "Install Passle button"
Alternatively, you can go to Microsoft Store on your browser and download the extension.
Below is an easy-to-follow video tutorial showing you how to get the button installed on your browser.
Getting Passle set up in Microsoft Edge