The new PDF viewer built into Firefox 19 is built using HTML5 so it's pretty snappy. Unless they're really into web development, the average user probably won't find any of the other updates too ...

View PDFs and PowerPoint files directly inside Chrome with this free add-on. Reading PDFs posted on the Web can be an annoying experience.Click a link to one, and ...

This well-designed and easy-to-use free PDF viewer lets you mark up and create PDFs. Adobe’s popular PDF format makes files look great and Adobe’s free Reader lets everyone look at the files for free.