Synapsa is excellent plugin extension that will help you read any content on the Internet, in a simple and easily accessible way.
Summary of Web Articles - By Briefiz
Summarize your articles and any given text- ONLINE
Web Version www.briefiz.com
How does it work ?
When you are on your article, click on the extension icon for get the summary of your article.
Summarized versions in four different lengths on any web page