If you have not added this Application to your library, or you are having trouble finding it please refer to this link and come back when you are done: Adding an application to your library and locating your instance Profile
Step 1. Navigate to your Stripe instance in your library. Click Sync now. This pop-up should appear, click on the slider below Browser Extension to enable it. Then click Next.
Step 2. This popup will appear, read the instructions and then click Launch Stripe