I wanted to inform you about the new EPUBReader-App: The app uses the same reading engine as the Firefox add-on, but also runs in Chrome and Internet Explorer 10 and needs no installation. Other than the add-on, the app
opens only ebooks which are already located on your computer.
Here you find more information about the app and also a link to try it: http://www.epubread.com/app/
Your feedback is welcome!