Drively is a Chrome extension that provides an improved file explorer for Google Drive.
Here are the features of Drively:
You can open Drively by clicking on the extension icon, or by using the keyboard shortcut CTRL-D (configurable).
Drively uses the chrome.identity API to get OAuth2 access tokens for your Google Drive. Your browser caches the OAuth2 token in memory. The token is never sent to a server or otherwise saved by the extension.
Using the OAuth2 token, Drively makes requests to the Google Drive API to create/read/update your Google Drive files whenever you initiate an action to do so. The data returned from the Google Drive API is stored in memory and is never sent to a server. You can read the source code at https://github.com/troq/drively to confirm that there is no server involved.