Improving, already worthy Rated 4 out of 5 stars

Getting better and better. This version of Mozilla Labs' PDF Viewer 0.3.175 is IMO worth replacing a PDF readers' plug-ins as well as Google Docs as PDF viewer.
I've tested with several PDF files on the Web, up to now no problem. I'd even say that the font quality is higher than that of Google's. I'll be sticking with this Mozilla PDF Viewer.

This review is for a previous version of the add-on (0.3.175).