Reader - Reader is the ultimate Reader tool for your Firefox that brings the Safari 5 Reader features to...
WebCull - WebCull is an ad-free, privacy-focused bookmark manager that works from any browser or device.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Save For Later - Allows you to bookmark any website to read later.
Pocket - When you find something you want to view later, put it in Pocket.
Purify - Read news articles with minimal distraction and scrolling.