How do I remove EbookCentral Cookies only from Firefox, leaving others intact.

How do I remove EbookCentral Cookies only from Firefox, leaving others intact.

You can clear cookies for a current website you are visiting :

To delete cookies and site data for a website you're currently visiting, for instance ebookcentral.com:
Click the Site Info Site Info button button at the left of the address bar. While you are already on ebookcentral.com
Then click Clear Cookies and Site Data

Fx65ClearDataSingleSite

This will only delete all cookies  for ebookcentral.proquest.com leaving other cookies for other websites intact.