Mendeley: From Webpages

Although Mendeley cannot automatically capture citation information from most web pages, you can still add web pages to your Mendeley library.

When you find a web page you would like to save to your library, open the Web Importer and click the check mark for the "Web Page" option:

Mendeley automatically captures a "snapshot" of the page. Taking a "snapshot" saves an .html file copy of the webpage as it appeared on the day you saved it to your library.