Many are saying that the icon doesn't appear in the sidebar, but you have to click on the extensions icon that looks like a box and the Bitwarden icon will be there, so next to it click on Pin and it will appear both in the sidebar and beside the address bar

Many are saying that the icon doesn't appear in the sidebar, but you have to click on the extensions icon that looks like a box and the Bitwarden icon will be there, so next to it click on Pin and it will appear both in the sidebar and beside the address bar