Importing files from the Frame.io extension to your Library or Timeline is done in a few steps. First, the file need to be saved locally. Right-mouse click the file and select Import. The source file is selected by default, but you have the option to download a proxy clip.
When a green checkmark appears on the asset, drag and drop the file to your Event Browser or directly to your timeline.
Note: Folders cannot be saved locally, only assets.