What are some alternatives?
Pocket - When you find something you want to view later, put it in Pocket.
Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Weava - Workspace to highlight, organize & collaborate on your research articles.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .