After installing Privowny App Browser Extension on Chrome, there are no steps you need to take to set it up. Once registered, you are good to go.
On versions prior to v.84, Chrome automatically adds new extensions to your navigation bar, to the right of the address bar, so you should find it there without difficulty. If the OI icon is orange, then you know you’re logged in; if the OI icon is gray, you’re logged out (click on the icon to log in).
As of v.84 (July 2020) however, Chrome has changed the way extensions are displayed. They will no longer appear automatically next to your browser’s address bar when you install them. To make your Browser Extension visible at all times, you will need to click on the “puzzle” icon next to your address bar to manage your extensions, then click on the “pin” icon next to the Privowny App Browser Extension.