"Save to Google Drive" lets you to save files or images available online easily in Google Drive from your Mozilla Firefox browser. You don't have to actually download the complete file, the link enough. You can analyze the page you are browsing to extract the links or images, select what you need and save them to Google Drive in a click.
This firefox add-on is based on the jetpack add-on library.
For more details and installation, see https://addons.mozilla.org/en-Us/firefox/addon/save-to-google-drive/