You can save references directly from your browser into EndNote Online or EndNote Desktop through the Capture Reference bookmarklet. The Capture Reference bookmarklet scans the bibliographic information presented on a Web page and create a reference that you can save to a new or existing group. If no group is specified, the reference is saved to Unfiled.

The Download Installers link from EndNote Online

To capture a reference:

1. Navigate to the web page that presents bibliographic data. (Refer to the list of Capture Compatible Sources.
2. Click the Capture button in the EndNote online toolbar or the Capture References bookmarklet button.
3. Complete or modify any of the reference fields.
4. Click the Save to button and select EndNote online . Alternately, select EndNote to save the reference to your library in EndNote desktop.

For Capture Reference to work best,

• You have to install the EndNote Online plug-in for Internet Explorer or Firefox 
  • Internet Explorer users: you can choose to download references to EndNote Online or another Thomson Reuters research software application if one is also installed.
  • Firefox users: if you have installed Zotero, you may need to unselect Zotero's handling of RIS files in Zotero preferences.
    • At this time, EndNote Online is not able to import records from resources that do not have an identifiable media type (mimetype) defined in the export file. 
• You must be in a Capture compatible resource and at the individual item level (not in a list of citations)
• A default reference type, the type most commonly used, is assigned to each Resource. After saving the reference with Capture, confirm that the reference type is correct and all fields indicated with asterisks are complete.

Courtesy of the University of Pittsburgh Library System

More Capture Reference information here here and here