This app was removed from the App Store.
PDF Master by Diigo
Mac OS Productivity
PDF Master is a Multiple tab PDF reader.
Besides these features
1) Multiple tabs as chrome
2) PDF annotation feature
3) List recently closed PDF files in thumbnails
4) Fast search
5) Drag and drop PDF file into the reader to open it directly.
You can save your PDF and annotations to Diigo account just as you annotate web pages.
fix some issues in OS X 10.12