I've been using this for a while in Firefox beta, and it's generally really good. I have two small problems with it, which perhaps won't be too hard to fix: 1

I've been using this for a while in Firefox beta, and it's generally really good. I have two small problems with it, which perhaps won't be too hard to fix: 1. PDFs of old academic papers that are just strung-together CCITT (fax) compressed monochrome scans. Preview.app, Adobe Reader and Chrome resample those to give a readable quasi-anti-aliased effect. PDF.js makes the text jaggy and spindly and hard to read. 2. No back/forward navigation.