Rated 5 out of 5 stars

Very beautiful (and expected !) native HTML5 extension. This feature will be buit-in in FF15.
Remark : to run it, it is necessary to desactivate the pdf plugins (I say plugins) such as Adobe acrobat, Sumatra, Zeon, etc. Then pdf no longer appears in options/preferences, applications.

This review is for a previous version of the add-on (0.3.452.1-signed).