After installing the Frames chrome extension, you'll notice a new floating icon in the bottom right hand corner of your screen. This icon is only visible when you are in your Bubble editor.
Frames launch icon
Clicking the icon exposes a new panel on the right side from which you can access your Frames account, sections and layouts.
Frames panel on the right
You will need to sign up to Frames from the panel before gaining access to the sections. Once signed up, Frames will be accessible in all of your Bubble apps. Make sure to use the same browser that you install the chrome extension on.